1 /*----------------------------------------------------------------------------/
2 / FatFs - Generic FAT Filesystem Module R0.15a /
3 /-----------------------------------------------------------------------------/
4 /
5 / Copyright (C) 2024, ChaN, all right reserved.
6 /
7 / FatFs module is an open source software. Redistribution and use of FatFs in
8 / source and binary forms, with or without modification, are permitted provided
9 / that the following condition is met:
10 /
11 / 1. Redistributions of source code must retain the above copyright notice,
12 / this condition and the following disclaimer.
13 /
14 / This software is provided by the copyright holder and contributors "AS IS"
15 / and any warranties related to this software are DISCLAIMED.
16 / The copyright owner or contributors be NOT LIABLE for any damages caused
17 / by use of this software.
18 /
19 /----------------------------------------------------------------------------*/
20
21
22 #include <string.h>
23 #include "ff.h" /* Declarations of FatFs API */
24 #include "diskio.h" /* Declarations of device I/O functions */
25
26
27 /*--------------------------------------------------------------------------
28
29 Module Private Definitions
30
31 ---------------------------------------------------------------------------*/
32
33 #if FF_DEFINED != 5380 /* Revision ID */
34 #error Wrong include file (ff.h).
35 #endif
36
37
38 /* Limits and boundaries */
39 #define MAX_DIR 0x200000 /* Max size of FAT directory (byte) */
40 #define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory (byte) */
41 #define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */
42 #define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */
43 #define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not defined in specs, practical limit) */
44 #define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */
45
46
47 /* Character code support macros */
48 #define IsUpper(c) ((c) >= 'A' && (c) <= 'Z')
49 #define IsLower(c) ((c) >= 'a' && (c) <= 'z')
50 #define IsDigit(c) ((c) >= '0' && (c) <= '9')
51 #define IsSeparator(c) ((c) == '/' || (c) == '\\')
52 #define IsTerminator(c) ((UINT)(c) < (FF_USE_LFN ? ' ' : '!'))
53 #define IsSurrogate(c) ((c) >= 0xD800 && (c) <= 0xDFFF)
54 #define IsSurrogateH(c) ((c) >= 0xD800 && (c) <= 0xDBFF)
55 #define IsSurrogateL(c) ((c) >= 0xDC00 && (c) <= 0xDFFF)
56
57
58 /* Additional file access control and file status flags for internal use */
59 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
60 #define FA_MODIFIED 0x40 /* File has been modified */
61 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
62
63
64 /* Additional file attribute bits for internal use */
65 #define AM_VOL 0x08 /* Volume label */
66 #define AM_LFN 0x0F /* LFN entry */
67 #define AM_MASK 0x3F /* Mask of defined bits in FAT */
68 #define AM_MASKX 0x37 /* Mask of defined bits in exFAT */
69
70
71 /* Name status flags in fn[11] */
72 #define NSFLAG 11 /* Index of the name status byte */
73 #define NS_LOSS 0x01 /* Out of 8.3 format */
74 #define NS_LFN 0x02 /* Force to create LFN entry */
75 #define NS_LAST 0x04 /* Last segment */
76 #define NS_BODY 0x08 /* Lower case flag (body) */
77 #define NS_EXT 0x10 /* Lower case flag (ext) */
78 #define NS_DOT 0x20 /* Dot entry */
79 #define NS_NOLFN 0x40 /* Do not find LFN */
80 #define NS_NONAME 0x80 /* Not followed */
81
82
83 /* exFAT directory entry types */
84 #define ET_BITMAP 0x81 /* Allocation bitmap */
85 #define ET_UPCASE 0x82 /* Up-case table */
86 #define ET_VLABEL 0x83 /* Volume label */
87 #define ET_FILEDIR 0x85 /* File and directory */
88 #define ET_STREAM 0xC0 /* Stream extension */
89 #define ET_FILENAME 0xC1 /* Name extension */
90
91
92 /* FatFs refers the FAT structures as simple byte array instead of structure member
93 / because the C structure is not binary compatible between different platforms */
94
95 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
96 #define BS_OEMName 3 /* OEM name (8-byte) */
97 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
98 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
99 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
100 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */
101 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */
102 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
103 #define BPB_Media 21 /* Media descriptor byte (BYTE) */
104 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
105 #define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */
106 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
107 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
108 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
109 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
110 #define BS_NTres 37 /* WindowsNT error flag (BYTE) */
111 #define BS_BootSig 38 /* Extended boot signature (BYTE) */
112 #define BS_VolID 39 /* Volume serial number (DWORD) */
113 #define BS_VolLab 43 /* Volume label string (8-byte) */
114 #define BS_FilSysType 54 /* Filesystem type string (8-byte) */
115 #define BS_BootCode 62 /* Boot code (448-byte) */
116 #define BS_55AA 510 /* Boot signature (WORD, for VBR and MBR) */
117
118 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
119 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
120 #define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */
121 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
122 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
123 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
124 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
125 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
126 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
127 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
128 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
129 #define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */
130 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
131
132 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
133 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
134 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
135 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
136 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
137 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
138 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
139 #define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */
140 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
141 #define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */
142 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (WORD, out of check sum calculation) */
143 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */
144 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */
145 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
146 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
147 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE, out of check sum calculation) */
148 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
149 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
150
151 #define DIR_Name 0 /* Short file name (11-byte) */
152 #define DIR_Attr 11 /* Attribute (BYTE) */
153 #define DIR_NTres 12 /* Low case flags of SFN (BYTE) */
154 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
155 #define DIR_CrtTime 14 /* Created time (DWORD) */
156 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */
157 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
158 #define DIR_ModTime 22 /* Modified time (DWORD) */
159 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
160 #define DIR_FileSize 28 /* File size (DWORD) */
161 #define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */
162 #define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */
163 #define LDIR_Type 12 /* LFN: Entry type (BYTE) */
164 #define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */
165 #define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */
166 #define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */
167 #define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */
168 #define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */
169 #define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */
170 #define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */
171 #define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */
172 #define XDIR_Attr 4 /* exFAT: File attribute (WORD) */
173 #define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */
174 #define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */
175 #define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */
176 #define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */
177 #define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */
178 #define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */
179 #define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */
180 #define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */
181 #define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */
182 #define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */
183 #define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */
184 #define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */
185 #define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */
186 #define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */
187
188 #define SZDIRE 32 /* Size of a directory entry */
189 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
190 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */
191 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
192
193 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
194 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
195 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
196 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
197 #define FSI_TrailSig 498 /* FAT32 FSI: Trailing signature (DWORD) */
198
199 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
200 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
201 #define PTE_Boot 0 /* MBR PTE: Boot indicator */
202 #define PTE_StHead 1 /* MBR PTE: Start head in CHS */
203 #define PTE_StSec 2 /* MBR PTE: Start sector in CHS */
204 #define PTE_StCyl 3 /* MBR PTE: Start cylinder in CHS */
205 #define PTE_System 4 /* MBR PTE: System ID */
206 #define PTE_EdHead 5 /* MBR PTE: End head in CHS */
207 #define PTE_EdSec 6 /* MBR PTE: End sector in CHS */
208 #define PTE_EdCyl 7 /* MBR PTE: End cylinder in CHS */
209 #define PTE_StLba 8 /* MBR PTE: Start in LBA */
210 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */
211
212 #define GPTH_Sign 0 /* GPT HDR: Signature (8-byte) */
213 #define GPTH_Rev 8 /* GPT HDR: Revision (DWORD) */
214 #define GPTH_Size 12 /* GPT HDR: Header size (DWORD) */
215 #define GPTH_Bcc 16 /* GPT HDR: Header BCC (DWORD) */
216 #define GPTH_CurLba 24 /* GPT HDR: This header LBA (QWORD) */
217 #define GPTH_BakLba 32 /* GPT HDR: Another header LBA (QWORD) */
218 #define GPTH_FstLba 40 /* GPT HDR: First LBA for partition data (QWORD) */
219 #define GPTH_LstLba 48 /* GPT HDR: Last LBA for partition data (QWORD) */
220 #define GPTH_DskGuid 56 /* GPT HDR: Disk GUID (16-byte) */
221 #define GPTH_PtOfs 72 /* GPT HDR: Partition table LBA (QWORD) */
222 #define GPTH_PtNum 80 /* GPT HDR: Number of table entries (DWORD) */
223 #define GPTH_PteSize 84 /* GPT HDR: Size of table entry (DWORD) */
224 #define GPTH_PtBcc 88 /* GPT HDR: Partition table BCC (DWORD) */
225 #define SZ_GPTE 128 /* GPT PTE: Size of partition table entry */
226 #define GPTE_PtGuid 0 /* GPT PTE: Partition type GUID (16-byte) */
227 #define GPTE_UpGuid 16 /* GPT PTE: Partition unique GUID (16-byte) */
228 #define GPTE_FstLba 32 /* GPT PTE: First LBA of partition (QWORD) */
229 #define GPTE_LstLba 40 /* GPT PTE: Last LBA of partition (QWORD) */
230 #define GPTE_Flags 48 /* GPT PTE: Partition flags (QWORD) */
231 #define GPTE_Name 56 /* GPT PTE: Partition name */
232
233
234 /* Post process on fatal error in the file operations */
235 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
236
237
238 /* Re-entrancy related */
239 #if FF_FS_REENTRANT
240 #if FF_USE_LFN == 1
241 #error Static LFN work area cannot be used in thread-safe configuration
242 #endif
243 #define LEAVE_FF(fs, res) { unlock_volume(fs, res); return res; }
244 #else
245 #define LEAVE_FF(fs, res) return res
246 #endif
247
248
249 /* Definitions of logical drive to physical location conversion */
250 #if FF_MULTI_PARTITION
251 #define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number from the mapping table */
252 #define LD2PT(vol) VolToPart[vol].pt /* Get partition number from the mapping table (0:auto search, 1-:forced partition number) */
253 #else
254 #define LD2PD(vol) (BYTE)(vol) /* Each logical drive is associated with the same physical drive number */
255 #define LD2PT(vol) 0 /* Auto partition search */
256 #endif
257
258
259 /* Definitions of sector size */
260 #if (FF_MAX_SS < FF_MIN_SS) || (FF_MAX_SS != 512 && FF_MAX_SS != 1024 && FF_MAX_SS != 2048 && FF_MAX_SS != 4096) || (FF_MIN_SS != 512 && FF_MIN_SS != 1024 && FF_MIN_SS != 2048 && FF_MIN_SS != 4096)
261 #error Wrong sector size configuration
262 #endif
263 #if FF_MAX_SS == FF_MIN_SS
264 #define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */
265 #else
266 #define SS(fs) ((fs)->ssize) /* Variable sector size */
267 #endif
268
269
270 /* Timestamp */
271 #if FF_FS_NORTC == 1
272 #if FF_NORTC_YEAR < 1980 || FF_NORTC_YEAR > 2107 || FF_NORTC_MON < 1 || FF_NORTC_MON > 12 || FF_NORTC_MDAY < 1 || FF_NORTC_MDAY > 31
273 #error Invalid FF_FS_NORTC settings
274 #endif
275 #define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)
276 #else
277 #define GET_FATTIME() get_fattime()
278 #endif
279
280
281 /* File lock controls */
282 #if FF_FS_LOCK
283 #if FF_FS_READONLY
284 #error FF_FS_LOCK must be 0 at read-only configuration
285 #endif
286 typedef struct { /* Open object identifier with status */
287 FATFS* fs; /* Object ID 1, volume (NULL:blank entry) */
288 DWORD clu; /* Object ID 2, containing directory (0:root) */
289 DWORD ofs; /* Object ID 3, offset in the directory */
290 UINT ctr; /* Object open status, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
291 } FILESEM;
292 #endif
293
294
295 /* SBCS up-case tables (\x80-\xFF) */
296 #define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
297 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
298 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
299 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
300 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
301 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
302 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
303 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
304 #define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
305 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
306 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
307 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
308 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
309 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
310 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
311 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
312 #define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
313 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
314 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
315 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
316 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
317 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
318 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
319 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
320 #define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
321 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
322 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
323 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
324 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
325 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
326 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
327 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
328 #define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
329 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
330 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
331 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
332 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
333 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
334 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
335 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
336 #define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
337 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
338 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
339 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
340 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
341 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
342 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
343 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
344 #define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
345 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
346 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
347 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
348 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
349 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
350 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
351 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
352 #define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
353 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
354 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
355 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
356 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
357 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
358 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
359 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
360 #define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
361 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
362 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
363 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
364 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
365 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
366 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
367 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
368 #define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
369 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
370 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
371 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
372 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
373 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
374 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
375 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
376 #define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
377 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
378 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
379 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
380 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
381 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
382 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
383 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
384 #define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
385 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
386 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
387 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
388 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
389 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
390 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
391 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
392 #define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
393 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
394 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
395 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
396 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
397 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
398 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
399 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
400 #define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
401 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
402 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
403 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
404 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
405 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
406 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
407 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
408 #define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
409 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
410 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
411 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
412 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
413 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
414 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
415 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
416 #define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
417 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
418 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
419 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
420 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
421 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
422 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
423 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
424 #define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
425 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
426 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
427 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
428 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
429 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
430 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
431 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
432
433
434 /* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */
435 /* <------> <------> <------> <------> <------> */
436 #define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00}
437 #define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00}
438 #define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE}
439 #define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00}
440
441
442 /* Macros for table definitions */
443 #define MERGE_2STR(a, b) a ## b
444 #define MKCVTBL(hd, cp) MERGE_2STR(hd, cp)
445
446
447
448
449 /*--------------------------------------------------------------------------
450
451 Module Private Work Area
452
453 ---------------------------------------------------------------------------*/
454 /* Remark: Variables defined here without initial value shall be guaranteed
455 / zero/null at start-up. If not, the linker option or start-up routine is
456 / not compliance with C standard. */
457
458 /*--------------------------------*/
459 /* File/Volume controls */
460 /*--------------------------------*/
461
462 #if FF_VOLUMES < 1 || FF_VOLUMES > 10
463 #error Wrong FF_VOLUMES setting
464 #endif
465 static FATFS *FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */
466 static WORD Fsid; /* Filesystem mount ID */
467
468 #if FF_FS_RPATH != 0
469 static BYTE CurrVol; /* Current drive number set by f_chdrive() */
470 #endif
471
472 #if FF_FS_LOCK
473 static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */
474 #if FF_FS_REENTRANT
475 static volatile BYTE SysLock; /* System lock flag to protect Files[] (0:no mutex, 1:unlocked, 2:locked) */
476 static volatile BYTE SysLockVolume; /* Volume id who is locking Files[] */
477 #endif
478 #endif
479
480 #if FF_STR_VOLUME_ID
481 #ifdef FF_VOLUME_STRS
482 static const char *const VolumeStr[FF_VOLUMES] = {FF_VOLUME_STRS}; /* Pre-defined volume ID */
483 #endif
484 #endif
485
486 #if FF_LBA64
487 #if FF_MIN_GPT > 0x100000000
488 #error Wrong FF_MIN_GPT setting
489 #endif
490 static const BYTE GUID_MS_Basic[16] = {0xA2,0xA0,0xD0,0xEB,0xE5,0xB9,0x33,0x44,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7};
491 #endif
492
493
494
495 /*--------------------------------*/
496 /* LFN/Directory working buffer */
497 /*--------------------------------*/
498
499 #if FF_USE_LFN == 0 /* Non-LFN configuration */
500 #if FF_FS_EXFAT
501 #error LFN must be enabled when enable exFAT
502 #endif
503 #define DEF_NAMBUF
504 #define INIT_NAMBUF(fs)
505 #define FREE_NAMBUF()
506 #define LEAVE_MKFS(res) return res
507
508 #else /* LFN configurations */
509 #if FF_MAX_LFN < 12 || FF_MAX_LFN > 255
510 #error Wrong setting of FF_MAX_LFN
511 #endif
512 #if FF_LFN_BUF < FF_SFN_BUF || FF_SFN_BUF < 12
513 #error Wrong setting of FF_LFN_BUF or FF_SFN_BUF
514 #endif
515 #if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3
516 #error Wrong setting of FF_LFN_UNICODE
517 #endif
518 static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* FAT: Offset of LFN characters in the directory entry */
519 #define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the name length */
520
521 #if FF_USE_LFN == 1 /* LFN enabled with static working buffer */
522 #if FF_FS_EXFAT
523 static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */
524 #endif
525 static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */
526 #define DEF_NAMBUF
527 #define INIT_NAMBUF(fs)
528 #define FREE_NAMBUF()
529 #define LEAVE_MKFS(res) return res
530
531 #elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
532 #if FF_FS_EXFAT
533 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */
534 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
535 #define FREE_NAMBUF()
536 #else
537 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */
538 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
539 #define FREE_NAMBUF()
540 #endif
541 #define LEAVE_MKFS(res) return res
542
543 #elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
544 #if FF_FS_EXFAT
545 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */
546 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2 + MAXDIRB(FF_MAX_LFN)); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+FF_MAX_LFN+1); }
547 #define FREE_NAMBUF() ff_memfree(lfn)
548 #else
549 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */
550 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
551 #define FREE_NAMBUF() ff_memfree(lfn)
552 #endif
553 #define LEAVE_MKFS(res) { if (!work) ff_memfree(buf); return res; }
554 #define MAX_MALLOC 0x8000 /* Must be >=FF_MAX_SS */
555
556 #else
557 #error Wrong setting of FF_USE_LFN
558
559 #endif /* FF_USE_LFN == 1 */
560 #endif /* FF_USE_LFN == 0 */
561
562
563
564 /*--------------------------------*/
565 /* Code conversion tables */
566 /*--------------------------------*/
567
568 #if FF_CODE_PAGE == 0 /* Run-time code page configuration */
569 #define CODEPAGE CodePage
570 static WORD CodePage; /* Current code page */
571 static const BYTE* ExCvt; /* Pointer to SBCS up-case table Ct???[] (null:disabled) */
572 static const BYTE* DbcTbl; /* Pointer to DBCS code range table Dc???[] (null:disabled) */
573
574 static const BYTE Ct437[] = TBL_CT437;
575 static const BYTE Ct720[] = TBL_CT720;
576 static const BYTE Ct737[] = TBL_CT737;
577 static const BYTE Ct771[] = TBL_CT771;
578 static const BYTE Ct775[] = TBL_CT775;
579 static const BYTE Ct850[] = TBL_CT850;
580 static const BYTE Ct852[] = TBL_CT852;
581 static const BYTE Ct855[] = TBL_CT855;
582 static const BYTE Ct857[] = TBL_CT857;
583 static const BYTE Ct860[] = TBL_CT860;
584 static const BYTE Ct861[] = TBL_CT861;
585 static const BYTE Ct862[] = TBL_CT862;
586 static const BYTE Ct863[] = TBL_CT863;
587 static const BYTE Ct864[] = TBL_CT864;
588 static const BYTE Ct865[] = TBL_CT865;
589 static const BYTE Ct866[] = TBL_CT866;
590 static const BYTE Ct869[] = TBL_CT869;
591 static const BYTE Dc932[] = TBL_DC932;
592 static const BYTE Dc936[] = TBL_DC936;
593 static const BYTE Dc949[] = TBL_DC949;
594 static const BYTE Dc950[] = TBL_DC950;
595
596 #elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */
597 #define CODEPAGE FF_CODE_PAGE
598 static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE);
599
600 #else /* Static code page configuration (DBCS) */
601 #define CODEPAGE FF_CODE_PAGE
602 static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE);
603
604 #endif
605
606
607
608
609 /*--------------------------------------------------------------------------
610
611 Module Private Functions
612
613 ---------------------------------------------------------------------------*/
614
615
616 /*-----------------------------------------------------------------------*/
617 /* Load/Store multi-byte word in the FAT structure */
618 /*-----------------------------------------------------------------------*/
619
ld_word(const BYTE * ptr)620 static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
621 {
622 WORD rv;
623
624 rv = ptr[1];
625 rv = rv << 8 | ptr[0];
626 return rv;
627 }
628
ld_dword(const BYTE * ptr)629 static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
630 {
631 DWORD rv;
632
633 rv = ptr[3];
634 rv = rv << 8 | ptr[2];
635 rv = rv << 8 | ptr[1];
636 rv = rv << 8 | ptr[0];
637 return rv;
638 }
639
640 #if FF_FS_EXFAT
ld_qword(const BYTE * ptr)641 static QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
642 {
643 QWORD rv;
644
645 rv = ptr[7];
646 rv = rv << 8 | ptr[6];
647 rv = rv << 8 | ptr[5];
648 rv = rv << 8 | ptr[4];
649 rv = rv << 8 | ptr[3];
650 rv = rv << 8 | ptr[2];
651 rv = rv << 8 | ptr[1];
652 rv = rv << 8 | ptr[0];
653 return rv;
654 }
655 #endif
656
657 #if !FF_FS_READONLY
st_word(BYTE * ptr,WORD val)658 static void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
659 {
660 *ptr++ = (BYTE)val; val >>= 8;
661 *ptr++ = (BYTE)val;
662 }
663
st_dword(BYTE * ptr,DWORD val)664 static void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
665 {
666 *ptr++ = (BYTE)val; val >>= 8;
667 *ptr++ = (BYTE)val; val >>= 8;
668 *ptr++ = (BYTE)val; val >>= 8;
669 *ptr++ = (BYTE)val;
670 }
671
672 #if FF_FS_EXFAT
st_qword(BYTE * ptr,QWORD val)673 static void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
674 {
675 *ptr++ = (BYTE)val; val >>= 8;
676 *ptr++ = (BYTE)val; val >>= 8;
677 *ptr++ = (BYTE)val; val >>= 8;
678 *ptr++ = (BYTE)val; val >>= 8;
679 *ptr++ = (BYTE)val; val >>= 8;
680 *ptr++ = (BYTE)val; val >>= 8;
681 *ptr++ = (BYTE)val; val >>= 8;
682 *ptr++ = (BYTE)val;
683 }
684 #endif
685 #endif /* !FF_FS_READONLY */
686
687
688
689 /*-----------------------------------------------------------------------*/
690 /* String functions */
691 /*-----------------------------------------------------------------------*/
692
693 /* Test if the byte is DBC 1st byte */
dbc_1st(BYTE c)694 static int dbc_1st (BYTE c)
695 {
696 #if FF_CODE_PAGE == 0 /* Variable code page */
697 if (DbcTbl && c >= DbcTbl[0]) {
698 if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */
699 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */
700 }
701 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
702 if (c >= DbcTbl[0]) {
703 if (c <= DbcTbl[1]) return 1;
704 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;
705 }
706 #else /* SBCS fixed code page */
707 if (c != 0) return 0; /* Always false */
708 #endif
709 return 0;
710 }
711
712
713 /* Test if the byte is DBC 2nd byte */
dbc_2nd(BYTE c)714 static int dbc_2nd (BYTE c)
715 {
716 #if FF_CODE_PAGE == 0 /* Variable code page */
717 if (DbcTbl && c >= DbcTbl[4]) {
718 if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */
719 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */
720 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */
721 }
722 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
723 if (c >= DbcTbl[4]) {
724 if (c <= DbcTbl[5]) return 1;
725 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;
726 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;
727 }
728 #else /* SBCS fixed code page */
729 if (c != 0) return 0; /* Always false */
730 #endif
731 return 0;
732 }
733
734
735 #if FF_USE_LFN
736
737 /* Get a Unicode code point from the TCHAR string in defined API encodeing */
tchar2uni(const TCHAR ** str)738 static DWORD tchar2uni ( /* Returns a character in UTF-16 encoding (>=0x10000 on surrogate pair, 0xFFFFFFFF on decode error) */
739 const TCHAR** str /* Pointer to pointer to TCHAR string in configured encoding */
740 )
741 {
742 DWORD uc;
743 const TCHAR *p = *str;
744
745 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
746 WCHAR wc;
747
748 uc = *p++; /* Get an encoding unit */
749 if (IsSurrogate(uc)) { /* Surrogate? */
750 wc = *p++; /* Get low surrogate */
751 if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF; /* Wrong surrogate? */
752 uc = uc << 16 | wc;
753 }
754
755 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
756 BYTE tb;
757 int nf;
758
759 uc = (BYTE)*p++; /* Get an encoding unit */
760 if (uc & 0x80) { /* Multiple byte code? */
761 if ((uc & 0xE0) == 0xC0) { /* 2-byte sequence? */
762 uc &= 0x1F; nf = 1;
763 } else if ((uc & 0xF0) == 0xE0) { /* 3-byte sequence? */
764 uc &= 0x0F; nf = 2;
765 } else if ((uc & 0xF8) == 0xF0) { /* 4-byte sequence? */
766 uc &= 0x07; nf = 3;
767 } else { /* Wrong sequence */
768 return 0xFFFFFFFF;
769 }
770 do { /* Get and merge trailing bytes */
771 tb = (BYTE)*p++;
772 if ((tb & 0xC0) != 0x80) return 0xFFFFFFFF; /* Wrong sequence? */
773 uc = uc << 6 | (tb & 0x3F);
774 } while (--nf != 0);
775 if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */
776 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
777 }
778
779 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
780 uc = (TCHAR)*p++; /* Get a unit */
781 if (uc >= 0x110000 || IsSurrogate(uc)) return 0xFFFFFFFF; /* Wrong code? */
782 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
783
784 #else /* ANSI/OEM input */
785 BYTE sb;
786 WCHAR wc;
787
788 wc = (BYTE)*p++; /* Get a byte */
789 if (dbc_1st((BYTE)wc)) { /* Is it a DBC 1st byte? */
790 sb = (BYTE)*p++; /* Get 2nd byte */
791 if (!dbc_2nd(sb)) return 0xFFFFFFFF; /* Invalid code? */
792 wc = (wc << 8) + sb; /* Make a DBC */
793 }
794 if (wc != 0) {
795 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM ==> Unicode */
796 if (wc == 0) return 0xFFFFFFFF; /* Invalid code? */
797 }
798 uc = wc;
799
800 #endif
801 *str = p; /* Next read pointer */
802 return uc;
803 }
804
805
806 /* Store a Unicode char in defined API encoding */
put_utf(DWORD chr,TCHAR * buf,UINT szb)807 static UINT put_utf ( /* Returns number of encoding units written (0:buffer overflow or wrong encoding) */
808 DWORD chr, /* UTF-16 encoded character (Surrogate pair if >=0x10000) */
809 TCHAR* buf, /* Output buffer */
810 UINT szb /* Size of the buffer */
811 )
812 {
813 #if FF_LFN_UNICODE == 1 /* UTF-16 output */
814 WCHAR hs, wc;
815
816 hs = (WCHAR)(chr >> 16);
817 wc = (WCHAR)chr;
818 if (hs == 0) { /* Single encoding unit? */
819 if (szb < 1 || IsSurrogate(wc)) return 0; /* Buffer overflow or wrong code? */
820 *buf = wc;
821 return 1;
822 }
823 if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0; /* Buffer overflow or wrong surrogate? */
824 *buf++ = hs;
825 *buf++ = wc;
826 return 2;
827
828 #elif FF_LFN_UNICODE == 2 /* UTF-8 output */
829 DWORD hc;
830
831 if (chr < 0x80) { /* Single byte code? */
832 if (szb < 1) return 0; /* Buffer overflow? */
833 *buf = (TCHAR)chr;
834 return 1;
835 }
836 if (chr < 0x800) { /* 2-byte sequence? */
837 if (szb < 2) return 0; /* Buffer overflow? */
838 *buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F));
839 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
840 return 2;
841 }
842 if (chr < 0x10000) { /* 3-byte sequence? */
843 if (szb < 3 || IsSurrogate(chr)) return 0; /* Buffer overflow or wrong code? */
844 *buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F));
845 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
846 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
847 return 3;
848 }
849 /* 4-byte sequence */
850 if (szb < 4) return 0; /* Buffer overflow? */
851 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
852 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
853 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
854 chr = (hc | chr) + 0x10000;
855 *buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07));
856 *buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F));
857 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
858 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
859 return 4;
860
861 #elif FF_LFN_UNICODE == 3 /* UTF-32 output */
862 DWORD hc;
863
864 if (szb < 1) return 0; /* Buffer overflow? */
865 if (chr >= 0x10000) { /* Out of BMP? */
866 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
867 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
868 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
869 chr = (hc | chr) + 0x10000;
870 }
871 *buf++ = (TCHAR)chr;
872 return 1;
873
874 #else /* ANSI/OEM output */
875 WCHAR wc;
876
877 wc = ff_uni2oem(chr, CODEPAGE);
878 if (wc >= 0x100) { /* Is this a DBC? */
879 if (szb < 2) return 0;
880 *buf++ = (char)(wc >> 8); /* Store DBC 1st byte */
881 *buf++ = (TCHAR)wc; /* Store DBC 2nd byte */
882 return 2;
883 }
884 if (wc == 0 || szb < 1) return 0; /* Invalid character or buffer overflow? */
885 *buf++ = (TCHAR)wc; /* Store the character */
886 return 1;
887 #endif
888 }
889 #endif /* FF_USE_LFN */
890
891
892 #if FF_FS_REENTRANT
893 /*-----------------------------------------------------------------------*/
894 /* Request/Release grant to access the volume */
895 /*-----------------------------------------------------------------------*/
896
lock_volume(FATFS * fs,int syslock)897 static int lock_volume ( /* 1:Ok, 0:timeout */
898 FATFS* fs, /* Filesystem object to lock */
899 int syslock /* System lock required */
900 )
901 {
902 int rv;
903
904
905 #if FF_FS_LOCK
906 rv = ff_mutex_take(fs->ldrv); /* Lock the volume */
907 if (rv && syslock) { /* System lock reqiered? */
908 rv = ff_mutex_take(FF_VOLUMES); /* Lock the system */
909 if (rv) {
910 SysLockVolume = fs->ldrv;
911 SysLock = 2; /* System lock succeeded */
912 } else {
913 ff_mutex_give(fs->ldrv); /* Failed system lock */
914 }
915 }
916 #else
917 rv = syslock ? ff_mutex_take(fs->ldrv) : ff_mutex_take(fs->ldrv); /* Lock the volume (this is to prevent compiler warning) */
918 #endif
919 return rv;
920 }
921
922
unlock_volume(FATFS * fs,FRESULT res)923 static void unlock_volume (
924 FATFS* fs, /* Filesystem object */
925 FRESULT res /* Result code to be returned */
926 )
927 {
928 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {
929 #if FF_FS_LOCK
930 if (SysLock == 2 && SysLockVolume == fs->ldrv) { /* Unlock system if it has been locked by this task */
931 SysLock = 1;
932 ff_mutex_give(FF_VOLUMES);
933 }
934 #endif
935 ff_mutex_give(fs->ldrv); /* Unlock the volume */
936 }
937 }
938
939 #endif
940
941
942
943 #if FF_FS_LOCK
944 /*-----------------------------------------------------------------------*/
945 /* File sharing control functions */
946 /*-----------------------------------------------------------------------*/
947
chk_share(DIR * dp,int acc)948 static FRESULT chk_share ( /* Check if the file can be accessed */
949 DIR* dp, /* Directory object pointing the file to be checked */
950 int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */
951 )
952 {
953 UINT i, be;
954
955 /* Search open object table for the object */
956 be = 0;
957 for (i = 0; i < FF_FS_LOCK; i++) {
958 if (Files[i].fs) { /* Existing entry */
959 if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */
960 Files[i].clu == dp->obj.sclust &&
961 Files[i].ofs == dp->dptr) break;
962 } else { /* Blank entry */
963 be = 1;
964 }
965 }
966 if (i == FF_FS_LOCK) { /* The object has not been opened */
967 return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */
968 }
969
970 /* The object was opened. Reject any open against writing file and all write mode open */
971 return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
972 }
973
974
enq_share(void)975 static int enq_share (void) /* Check if an entry is available for a new object */
976 {
977 UINT i;
978
979 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ; /* Find a free entry */
980 return (i == FF_FS_LOCK) ? 0 : 1;
981 }
982
983
inc_share(DIR * dp,int acc)984 static UINT inc_share ( /* Increment object open counter and returns its index (0:Internal error) */
985 DIR* dp, /* Directory object pointing the file to register or increment */
986 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
987 )
988 {
989 UINT i;
990
991
992 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */
993 if (Files[i].fs == dp->obj.fs
994 && Files[i].clu == dp->obj.sclust
995 && Files[i].ofs == dp->dptr) break;
996 }
997
998 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */
999 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ; /* Find a free entry */
1000 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */
1001 Files[i].fs = dp->obj.fs;
1002 Files[i].clu = dp->obj.sclust;
1003 Files[i].ofs = dp->dptr;
1004 Files[i].ctr = 0;
1005 }
1006
1007 if (acc >= 1 && Files[i].ctr) return 0; /* Access violation (int err) */
1008
1009 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
1010
1011 return i + 1; /* Index number origin from 1 */
1012 }
1013
1014
dec_share(UINT i)1015 static FRESULT dec_share ( /* Decrement object open counter */
1016 UINT i /* Semaphore index (1..) */
1017 )
1018 {
1019 UINT n;
1020 FRESULT res;
1021
1022
1023 if (--i < FF_FS_LOCK) { /* Index number origin from 0 */
1024 n = Files[i].ctr;
1025 if (n == 0x100) n = 0; /* If write mode open, delete the object semaphore */
1026 if (n > 0) n--; /* Decrement read mode open count */
1027 Files[i].ctr = n;
1028 if (n == 0) { /* Delete the object semaphore if open count becomes zero */
1029 Files[i].fs = 0; /* Free the entry <<<If this memory write operation is not in atomic, FF_FS_REENTRANT == 1 and FF_VOLUMES > 1, there is a potential error in this process >>> */
1030 }
1031 res = FR_OK;
1032 } else {
1033 res = FR_INT_ERR; /* Invalid index number */
1034 }
1035 return res;
1036 }
1037
1038
clear_share(FATFS * fs)1039 static void clear_share ( /* Clear all lock entries of the volume */
1040 FATFS* fs
1041 )
1042 {
1043 UINT i;
1044
1045 for (i = 0; i < FF_FS_LOCK; i++) {
1046 if (Files[i].fs == fs) Files[i].fs = 0;
1047 }
1048 }
1049
1050 #endif /* FF_FS_LOCK */
1051
1052
1053
1054 /*-----------------------------------------------------------------------*/
1055 /* Move/Flush disk access window in the filesystem object */
1056 /*-----------------------------------------------------------------------*/
1057 #if !FF_FS_READONLY
sync_window(FATFS * fs)1058 static FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */
1059 FATFS* fs /* Filesystem object */
1060 )
1061 {
1062 FRESULT res = FR_OK;
1063
1064
1065 if (fs->wflag) { /* Is the disk access window dirty? */
1066 if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write it back into the volume */
1067 fs->wflag = 0; /* Clear window dirty flag */
1068 if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */
1069 if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */
1070 }
1071 } else {
1072 res = FR_DISK_ERR;
1073 }
1074 }
1075 return res;
1076 }
1077 #endif
1078
1079
move_window(FATFS * fs,LBA_t sect)1080 static FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */
1081 FATFS* fs, /* Filesystem object */
1082 LBA_t sect /* Sector LBA to make appearance in the fs->win[] */
1083 )
1084 {
1085 FRESULT res = FR_OK;
1086
1087
1088 if (sect != fs->winsect) { /* Window offset changed? */
1089 #if !FF_FS_READONLY
1090 res = sync_window(fs); /* Flush the window */
1091 #endif
1092 if (res == FR_OK) { /* Fill sector window with new data */
1093 if (disk_read(fs->pdrv, fs->win, sect, 1) != RES_OK) {
1094 sect = (LBA_t)0 - 1; /* Invalidate window if read data is not valid */
1095 res = FR_DISK_ERR;
1096 }
1097 fs->winsect = sect;
1098 }
1099 }
1100 return res;
1101 }
1102
1103
1104
1105
1106 #if !FF_FS_READONLY
1107 /*-----------------------------------------------------------------------*/
1108 /* Synchronize filesystem and data on the storage */
1109 /*-----------------------------------------------------------------------*/
1110
sync_fs(FATFS * fs)1111 static FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */
1112 FATFS* fs /* Filesystem object */
1113 )
1114 {
1115 FRESULT res;
1116
1117
1118 res = sync_window(fs);
1119 if (res == FR_OK) {
1120 if (fs->fsi_flag == 1) { /* Allocation changed? */
1121 fs->fsi_flag = 0;
1122 if (fs->fs_type == FS_FAT32) { /* FAT32: Update FSInfo sector */
1123 /* Create FSInfo structure */
1124 memset(fs->win, 0, sizeof fs->win);
1125 st_dword(fs->win + FSI_LeadSig, 0x41615252); /* Leading signature */
1126 st_dword(fs->win + FSI_StrucSig, 0x61417272); /* Structure signature */
1127 st_dword(fs->win + FSI_Free_Count, fs->free_clst); /* Number of free clusters */
1128 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst); /* Last allocated culuster */
1129 st_dword(fs->win + FSI_TrailSig, 0xAA550000); /* Trailing signature */
1130 disk_write(fs->pdrv, fs->win, fs->winsect = fs->volbase + 1, 1); /* Write it into the FSInfo sector (Next to VBR) */
1131 }
1132 #if FF_FS_EXFAT
1133 else if (fs->fs_type == FS_EXFAT) { /* exFAT: Update PercInUse field in BPB */
1134 if (disk_read(fs->pdrv, fs->win, fs->winsect = fs->volbase, 1) == RES_OK) { /* Load VBR */
1135 BYTE perc_inuse = (fs->free_clst <= fs->n_fatent - 2) ? (BYTE)((QWORD)(fs->n_fatent - 2 - fs->free_clst) * 100 / (fs->n_fatent - 2)) : 0xFF; /* Precent in use 0-100 or 0xFF(unknown) */
1136
1137 if (fs->win[BPB_PercInUseEx] != perc_inuse) { /* Write it back into VBR if needed */
1138 fs->win[BPB_PercInUseEx] = perc_inuse;
1139 disk_write(fs->pdrv, fs->win, fs->winsect, 1);
1140 }
1141 }
1142 }
1143 #endif
1144 }
1145 /* Make sure that no pending write process in the lower layer */
1146 if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;
1147 }
1148
1149 return res;
1150 }
1151
1152 #endif
1153
1154
1155
1156 /*-----------------------------------------------------------------------*/
1157 /* Get physical sector number from cluster number */
1158 /*-----------------------------------------------------------------------*/
1159
clst2sect(FATFS * fs,DWORD clst)1160 static LBA_t clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
1161 FATFS* fs, /* Filesystem object */
1162 DWORD clst /* Cluster# to be converted */
1163 )
1164 {
1165 clst -= 2; /* Cluster number is origin from 2 */
1166 if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */
1167 return fs->database + (LBA_t)fs->csize * clst; /* Start sector number of the cluster */
1168 }
1169
1170
1171
1172
1173 /*-----------------------------------------------------------------------*/
1174 /* FAT access - Read value of an FAT entry */
1175 /*-----------------------------------------------------------------------*/
1176
get_fat(FFOBJID * obj,DWORD clst)1177 static DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
1178 FFOBJID* obj, /* Corresponding object */
1179 DWORD clst /* Cluster number to get the value */
1180 )
1181 {
1182 UINT wc, bc;
1183 DWORD val;
1184 FATFS *fs = obj->fs;
1185
1186
1187 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
1188 val = 1; /* Internal error */
1189
1190 } else {
1191 val = 0xFFFFFFFF; /* Default value falls on disk error */
1192
1193 switch (fs->fs_type) {
1194 case FS_FAT12 :
1195 bc = (UINT)clst; bc += bc / 2;
1196 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1197 wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */
1198 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1199 wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */
1200 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */
1201 break;
1202
1203 case FS_FAT16 :
1204 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
1205 val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */
1206 break;
1207
1208 case FS_FAT32 :
1209 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1210 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */
1211 break;
1212 #if FF_FS_EXFAT
1213 case FS_EXFAT :
1214 if ((obj->objsize != 0 && obj->sclust != 0) || obj->stat == 0) { /* Object except root dir must have valid data length */
1215 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
1216 DWORD clen = (DWORD)((LBA_t)((obj->objsize - 1) / SS(fs)) / fs->csize); /* Number of clusters - 1 */
1217
1218 if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */
1219 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */
1220 break;
1221 }
1222 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */
1223 val = clst + 1; /* Generate the value */
1224 break;
1225 }
1226 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
1227 if (obj->n_frag != 0) { /* Is it on the growing edge? */
1228 val = 0x7FFFFFFF; /* Generate EOC */
1229 } else {
1230 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1231 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
1232 }
1233 break;
1234 }
1235 }
1236 val = 1; /* Internal error */
1237 break;
1238 #endif
1239 default:
1240 val = 1; /* Internal error */
1241 }
1242 }
1243
1244 return val;
1245 }
1246
1247
1248
1249
1250 #if !FF_FS_READONLY
1251 /*-----------------------------------------------------------------------*/
1252 /* FAT access - Change value of an FAT entry */
1253 /*-----------------------------------------------------------------------*/
1254
put_fat(FATFS * fs,DWORD clst,DWORD val)1255 static FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
1256 FATFS* fs, /* Corresponding filesystem object */
1257 DWORD clst, /* FAT index number (cluster number) to be changed */
1258 DWORD val /* New value to be set to the entry */
1259 )
1260 {
1261 UINT bc;
1262 BYTE *p;
1263 FRESULT res = FR_INT_ERR;
1264
1265
1266 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
1267 switch (fs->fs_type) {
1268 case FS_FAT12:
1269 bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */
1270 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1271 if (res != FR_OK) break;
1272 p = fs->win + bc++ % SS(fs);
1273 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Update 1st byte */
1274 fs->wflag = 1;
1275 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1276 if (res != FR_OK) break;
1277 p = fs->win + bc % SS(fs);
1278 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Update 2nd byte */
1279 fs->wflag = 1;
1280 break;
1281
1282 case FS_FAT16:
1283 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
1284 if (res != FR_OK) break;
1285 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */
1286 fs->wflag = 1;
1287 break;
1288
1289 case FS_FAT32:
1290 #if FF_FS_EXFAT
1291 case FS_EXFAT:
1292 #endif
1293 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
1294 if (res != FR_OK) break;
1295 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1296 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
1297 }
1298 st_dword(fs->win + clst * 4 % SS(fs), val);
1299 fs->wflag = 1;
1300 break;
1301 }
1302 }
1303 return res;
1304 }
1305
1306 #endif /* !FF_FS_READONLY */
1307
1308
1309
1310
1311 #if FF_FS_EXFAT && !FF_FS_READONLY
1312 /*-----------------------------------------------------------------------*/
1313 /* exFAT: Accessing FAT and Allocation Bitmap */
1314 /*-----------------------------------------------------------------------*/
1315
1316 /*--------------------------------------*/
1317 /* Find a contiguous free cluster block */
1318 /*--------------------------------------*/
1319
find_bitmap(FATFS * fs,DWORD clst,DWORD ncl)1320 static DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */
1321 FATFS* fs, /* Filesystem object */
1322 DWORD clst, /* Cluster number to scan from */
1323 DWORD ncl /* Number of contiguous clusters to find (1..) */
1324 )
1325 {
1326 BYTE bm, bv;
1327 UINT i;
1328 DWORD val, scl, ctr;
1329
1330
1331 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
1332 if (clst >= fs->n_fatent - 2) clst = 0;
1333 scl = val = clst; ctr = 0;
1334 for (;;) {
1335 if (move_window(fs, fs->bitbase + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF;
1336 i = val / 8 % SS(fs); bm = 1 << (val % 8);
1337 do {
1338 do {
1339 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
1340 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
1341 val = 0; bm = 0; i = SS(fs);
1342 }
1343 if (bv == 0) { /* Is it a free cluster? */
1344 if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */
1345 } else {
1346 scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */
1347 }
1348 if (val == clst) return 0; /* All cluster scanned? */
1349 } while (bm != 0);
1350 bm = 1;
1351 } while (++i < SS(fs));
1352 }
1353 }
1354
1355
1356 /*----------------------------------------*/
1357 /* Set/Clear a block of allocation bitmap */
1358 /*----------------------------------------*/
1359
change_bitmap(FATFS * fs,DWORD clst,DWORD ncl,int bv)1360 static FRESULT change_bitmap (
1361 FATFS* fs, /* Filesystem object */
1362 DWORD clst, /* Cluster number to change from */
1363 DWORD ncl, /* Number of clusters to be changed */
1364 int bv /* bit value to be set (0 or 1) */
1365 )
1366 {
1367 BYTE bm;
1368 UINT i;
1369 LBA_t sect;
1370
1371
1372 clst -= 2; /* The first bit corresponds to cluster #2 */
1373 sect = fs->bitbase + clst / 8 / SS(fs); /* Sector address */
1374 i = clst / 8 % SS(fs); /* Byte offset in the sector */
1375 bm = 1 << (clst % 8); /* Bit mask in the byte */
1376 for (;;) {
1377 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
1378 do {
1379 do {
1380 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
1381 fs->win[i] ^= bm; /* Flip the bit */
1382 fs->wflag = 1;
1383 if (--ncl == 0) return FR_OK; /* All bits processed? */
1384 } while (bm <<= 1); /* Next bit */
1385 bm = 1;
1386 } while (++i < SS(fs)); /* Next byte */
1387 i = 0;
1388 }
1389 }
1390
1391
1392 /*---------------------------------------------*/
1393 /* Fill the first fragment of the FAT chain */
1394 /*---------------------------------------------*/
1395
fill_first_frag(FFOBJID * obj)1396 static FRESULT fill_first_frag (
1397 FFOBJID* obj /* Pointer to the corresponding object */
1398 )
1399 {
1400 FRESULT res;
1401 DWORD cl, n;
1402
1403
1404 if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */
1405 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
1406 res = put_fat(obj->fs, cl, cl + 1);
1407 if (res != FR_OK) return res;
1408 }
1409 obj->stat = 0; /* Change status 'FAT chain is valid' */
1410 }
1411 return FR_OK;
1412 }
1413
1414
1415 /*---------------------------------------------*/
1416 /* Fill the last fragment of the FAT chain */
1417 /*---------------------------------------------*/
1418
fill_last_frag(FFOBJID * obj,DWORD lcl,DWORD term)1419 static FRESULT fill_last_frag (
1420 FFOBJID* obj, /* Pointer to the corresponding object */
1421 DWORD lcl, /* Last cluster of the fragment */
1422 DWORD term /* Value to set the last FAT entry */
1423 )
1424 {
1425 FRESULT res;
1426
1427
1428 while (obj->n_frag > 0) { /* Create the chain of last fragment */
1429 res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term);
1430 if (res != FR_OK) return res;
1431 obj->n_frag--;
1432 }
1433 return FR_OK;
1434 }
1435
1436 #endif /* FF_FS_EXFAT && !FF_FS_READONLY */
1437
1438
1439
1440 #if !FF_FS_READONLY
1441 /*-----------------------------------------------------------------------*/
1442 /* FAT handling - Remove a cluster chain */
1443 /*-----------------------------------------------------------------------*/
1444
remove_chain(FFOBJID * obj,DWORD clst,DWORD pclst)1445 static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
1446 FFOBJID* obj, /* Corresponding object */
1447 DWORD clst, /* Cluster to remove a chain from */
1448 DWORD pclst /* Previous cluster of clst (0 if entire chain) */
1449 )
1450 {
1451 FRESULT res = FR_OK;
1452 DWORD nxt;
1453 FATFS *fs = obj->fs;
1454 #if FF_FS_EXFAT || FF_USE_TRIM
1455 DWORD scl = clst, ecl = clst;
1456 #endif
1457 #if FF_USE_TRIM
1458 LBA_t rt[2];
1459 #endif
1460
1461 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
1462
1463 /* Mark the previous cluster 'EOC' on the FAT if it exists */
1464 if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
1465 res = put_fat(fs, pclst, 0xFFFFFFFF);
1466 if (res != FR_OK) return res;
1467 }
1468
1469 /* Remove the chain */
1470 do {
1471 nxt = get_fat(obj, clst); /* Get cluster status */
1472 if (nxt == 0) break; /* Empty cluster? */
1473 if (nxt == 1) return FR_INT_ERR; /* Internal error? */
1474 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
1475 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1476 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
1477 if (res != FR_OK) return res;
1478 }
1479 if (fs->free_clst < fs->n_fatent - 2) { /* Update allocation information if it is valid */
1480 fs->free_clst++;
1481 fs->fsi_flag |= 1;
1482 }
1483 #if FF_FS_EXFAT || FF_USE_TRIM
1484 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
1485 ecl = nxt;
1486 } else { /* End of contiguous cluster block */
1487 #if FF_FS_EXFAT
1488 if (fs->fs_type == FS_EXFAT) {
1489 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
1490 if (res != FR_OK) return res;
1491 }
1492 #endif
1493 #if FF_USE_TRIM
1494 rt[0] = clst2sect(fs, scl); /* Start of data area to be freed */
1495 rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area to be freed */
1496 disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform storage device that the data in the block may be erased */
1497 #endif
1498 scl = ecl = nxt;
1499 }
1500 #endif
1501 clst = nxt; /* Next cluster */
1502 } while (clst < fs->n_fatent); /* Repeat until the last link */
1503
1504 #if FF_FS_EXFAT
1505 /* Some post processes for chain status */
1506 if (fs->fs_type == FS_EXFAT) {
1507 if (pclst == 0) { /* Has the entire chain been removed? */
1508 obj->stat = 0; /* Change the chain status 'initial' */
1509 } else {
1510 if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */
1511 clst = obj->sclust; /* Follow the chain to check if it gets contiguous */
1512 while (clst != pclst) {
1513 nxt = get_fat(obj, clst);
1514 if (nxt < 2) return FR_INT_ERR;
1515 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;
1516 if (nxt != clst + 1) break; /* Not contiguous? */
1517 clst++;
1518 }
1519 if (clst == pclst) { /* Has the chain got contiguous again? */
1520 obj->stat = 2; /* Change the chain status 'contiguous' */
1521 }
1522 } else {
1523 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */
1524 obj->stat = 2; /* Change the chain status 'contiguous' */
1525 }
1526 }
1527 }
1528 }
1529 #endif
1530 return FR_OK;
1531 }
1532
1533
1534
1535
1536 /*-----------------------------------------------------------------------*/
1537 /* FAT handling - Stretch a chain or Create a new chain */
1538 /*-----------------------------------------------------------------------*/
1539
create_chain(FFOBJID * obj,DWORD clst)1540 static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
1541 FFOBJID* obj, /* Corresponding object */
1542 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
1543 )
1544 {
1545 DWORD cs, ncl, scl;
1546 FRESULT res;
1547 FATFS *fs = obj->fs;
1548
1549
1550 if (clst == 0) { /* Create a new chain */
1551 scl = fs->last_clst; /* Suggested cluster to start to find */
1552 if (scl == 0 || scl >= fs->n_fatent) scl = 1;
1553 }
1554 else { /* Stretch a chain */
1555 cs = get_fat(obj, clst); /* Check the cluster status */
1556 if (cs < 2) return 1; /* Test for insanity */
1557 if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */
1558 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1559 scl = clst; /* Cluster to start to find */
1560 }
1561 if (fs->free_clst == 0) return 0; /* No free cluster */
1562
1563 #if FF_FS_EXFAT
1564 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
1565 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
1566 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
1567 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
1568 if (res == FR_INT_ERR) return 1;
1569 if (res == FR_DISK_ERR) return 0xFFFFFFFF;
1570 if (clst == 0) { /* Is it a new chain? */
1571 obj->stat = 2; /* Set status 'contiguous' */
1572 } else { /* It is a stretched chain */
1573 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
1574 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
1575 obj->stat = 3; /* Change status 'just fragmented' */
1576 }
1577 }
1578 if (obj->stat != 2) { /* Is the file non-contiguous? */
1579 if (ncl == clst + 1) { /* Is the cluster next to previous one? */
1580 obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */
1581 } else { /* New fragment */
1582 if (obj->n_frag == 0) obj->n_frag = 1;
1583 res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */
1584 if (res == FR_OK) obj->n_frag = 1;
1585 }
1586 }
1587 } else
1588 #endif
1589 { /* On the FAT/FAT32 volume */
1590 ncl = 0;
1591 if (scl == clst) { /* Stretching an existing chain? */
1592 ncl = scl + 1; /* Test if next cluster is free */
1593 if (ncl >= fs->n_fatent) ncl = 2;
1594 cs = get_fat(obj, ncl); /* Get next cluster status */
1595 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1596 if (cs != 0) { /* Not free? */
1597 cs = fs->last_clst; /* Start at suggested cluster if it is valid */
1598 if (cs >= 2 && cs < fs->n_fatent) scl = cs;
1599 ncl = 0;
1600 }
1601 }
1602 if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */
1603 ncl = scl; /* Start cluster */
1604 for (;;) {
1605 ncl++; /* Next cluster */
1606 if (ncl >= fs->n_fatent) { /* Check wrap-around */
1607 ncl = 2;
1608 if (ncl > scl) return 0; /* No free cluster found? */
1609 }
1610 cs = get_fat(obj, ncl); /* Get the cluster status */
1611 if (cs == 0) break; /* Found a free cluster? */
1612 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1613 if (ncl == scl) return 0; /* No free cluster found? */
1614 }
1615 }
1616 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
1617 if (res == FR_OK && clst != 0) {
1618 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
1619 }
1620 }
1621
1622 if (res == FR_OK) { /* Update allocation information if the function succeeded */
1623 fs->last_clst = ncl;
1624 if (fs->free_clst > 0 && fs->free_clst <= fs->n_fatent - 2) {
1625 fs->free_clst--;
1626 fs->fsi_flag |= 1;
1627 }
1628 } else {
1629 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */
1630 }
1631
1632 return ncl; /* Return new cluster number or error status */
1633 }
1634
1635 #endif /* !FF_FS_READONLY */
1636
1637
1638
1639
1640 #if FF_USE_FASTSEEK
1641 /*-----------------------------------------------------------------------*/
1642 /* FAT handling - Convert offset into cluster with link map table */
1643 /*-----------------------------------------------------------------------*/
1644
clmt_clust(FIL * fp,FSIZE_t ofs)1645 static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1646 FIL* fp, /* Pointer to the file object */
1647 FSIZE_t ofs /* File offset to be converted to cluster# */
1648 )
1649 {
1650 DWORD cl, ncl;
1651 DWORD *tbl;
1652 FATFS *fs = fp->obj.fs;
1653
1654
1655 tbl = fp->cltbl + 1; /* Top of CLMT */
1656 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
1657 for (;;) {
1658 ncl = *tbl++; /* Number of cluters in the fragment */
1659 if (ncl == 0) return 0; /* End of table? (error) */
1660 if (cl < ncl) break; /* In this fragment? */
1661 cl -= ncl; tbl++; /* Next fragment */
1662 }
1663 return cl + *tbl; /* Return the cluster number */
1664 }
1665
1666 #endif /* FF_USE_FASTSEEK */
1667
1668
1669
1670
1671 /*-----------------------------------------------------------------------*/
1672 /* Directory handling - Fill a cluster with zeros */
1673 /*-----------------------------------------------------------------------*/
1674
1675 #if !FF_FS_READONLY
dir_clear(FATFS * fs,DWORD clst)1676 static FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */
1677 FATFS *fs, /* Filesystem object */
1678 DWORD clst /* Directory table to clear */
1679 )
1680 {
1681 LBA_t sect;
1682 UINT n, szb;
1683 BYTE *ibuf;
1684
1685
1686 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
1687 sect = clst2sect(fs, clst); /* Top of the cluster */
1688 fs->winsect = sect; /* Set window to top of the cluster */
1689 memset(fs->win, 0, sizeof fs->win); /* Clear window buffer */
1690 #if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */
1691 /* Allocate a temporary buffer */
1692 for (szb = ((DWORD)fs->csize * SS(fs) >= MAX_MALLOC) ? MAX_MALLOC : fs->csize * SS(fs), ibuf = 0; szb > SS(fs) && (ibuf = ff_memalloc(szb)) == 0; szb /= 2) ;
1693 if (szb > SS(fs)) { /* Buffer allocated? */
1694 memset(ibuf, 0, szb);
1695 szb /= SS(fs); /* Bytes -> Sectors */
1696 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1697 ff_memfree(ibuf);
1698 } else
1699 #endif
1700 {
1701 ibuf = fs->win; szb = 1; /* Use window buffer (many single-sector writes may take a time) */
1702 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1703 }
1704 return (n == fs->csize) ? FR_OK : FR_DISK_ERR;
1705 }
1706 #endif /* !FF_FS_READONLY */
1707
1708
1709
1710
1711 /*-----------------------------------------------------------------------*/
1712 /* Directory handling - Set directory index */
1713 /*-----------------------------------------------------------------------*/
1714
dir_sdi(DIR * dp,DWORD ofs)1715 static FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1716 DIR* dp, /* Pointer to directory object */
1717 DWORD ofs /* Offset of directory table */
1718 )
1719 {
1720 DWORD csz, clst;
1721 FATFS *fs = dp->obj.fs;
1722
1723
1724 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
1725 return FR_INT_ERR;
1726 }
1727 dp->dptr = ofs; /* Set current offset */
1728 clst = dp->obj.sclust; /* Table start cluster (0:root) */
1729 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
1730 clst = (DWORD)fs->dirbase;
1731 if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
1732 }
1733
1734 if (clst == 0) { /* Static table (root-directory on the FAT volume) */
1735 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
1736 dp->sect = fs->dirbase;
1737
1738 } else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */
1739 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
1740 while (ofs >= csz) { /* Follow cluster chain */
1741 clst = get_fat(&dp->obj, clst); /* Get next cluster */
1742 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1743 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
1744 ofs -= csz;
1745 }
1746 dp->sect = clst2sect(fs, clst);
1747 }
1748 dp->clust = clst; /* Current cluster# */
1749 if (dp->sect == 0) return FR_INT_ERR;
1750 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
1751 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
1752
1753 return FR_OK;
1754 }
1755
1756
1757
1758
1759 /*-----------------------------------------------------------------------*/
1760 /* Directory handling - Move directory table index next */
1761 /*-----------------------------------------------------------------------*/
1762
dir_next(DIR * dp,int stretch)1763 static FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1764 DIR* dp, /* Pointer to the directory object */
1765 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1766 )
1767 {
1768 DWORD ofs, clst;
1769 FATFS *fs = dp->obj.fs;
1770
1771
1772 ofs = dp->dptr + SZDIRE; /* Next entry */
1773 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) dp->sect = 0; /* Disable it if the offset reached the max value */
1774 if (dp->sect == 0) return FR_NO_FILE; /* Report EOT if it has been disabled */
1775
1776 if (ofs % SS(fs) == 0) { /* Sector changed? */
1777 dp->sect++; /* Next sector */
1778
1779 if (dp->clust == 0) { /* Static table */
1780 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
1781 dp->sect = 0; return FR_NO_FILE;
1782 }
1783 }
1784 else { /* Dynamic table */
1785 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
1786 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
1787 if (clst <= 1) return FR_INT_ERR; /* Internal error */
1788 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1789 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */
1790 #if !FF_FS_READONLY
1791 if (!stretch) { /* If no stretch, report EOT */
1792 dp->sect = 0; return FR_NO_FILE;
1793 }
1794 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
1795 if (clst == 0) return FR_DENIED; /* No free cluster */
1796 if (clst == 1) return FR_INT_ERR; /* Internal error */
1797 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1798 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */
1799 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */
1800 #else
1801 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */
1802 dp->sect = 0; return FR_NO_FILE; /* Report EOT */
1803 #endif
1804 }
1805 dp->clust = clst; /* Initialize data for new cluster */
1806 dp->sect = clst2sect(fs, clst);
1807 }
1808 }
1809 }
1810 dp->dptr = ofs; /* Current entry */
1811 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
1812
1813 return FR_OK;
1814 }
1815
1816
1817
1818
1819 #if !FF_FS_READONLY
1820 /*-----------------------------------------------------------------------*/
1821 /* Directory handling - Reserve a block of directory entries */
1822 /*-----------------------------------------------------------------------*/
1823
dir_alloc(DIR * dp,UINT n_ent)1824 static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1825 DIR* dp, /* Pointer to the directory object */
1826 UINT n_ent /* Number of contiguous entries to allocate */
1827 )
1828 {
1829 FRESULT res;
1830 UINT n;
1831 FATFS *fs = dp->obj.fs;
1832
1833
1834 res = dir_sdi(dp, 0);
1835 if (res == FR_OK) {
1836 n = 0;
1837 do {
1838 res = move_window(fs, dp->sect);
1839 if (res != FR_OK) break;
1840 #if FF_FS_EXFAT
1841 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { /* Is the entry free? */
1842 #else
1843 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { /* Is the entry free? */
1844 #endif
1845 if (++n == n_ent) break; /* Is a block of contiguous free entries found? */
1846 } else {
1847 n = 0; /* Not a free entry, restart to search */
1848 }
1849 res = dir_next(dp, 1); /* Next entry with table stretch enabled */
1850 } while (res == FR_OK);
1851 }
1852
1853 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1854 return res;
1855 }
1856
1857 #endif /* !FF_FS_READONLY */
1858
1859
1860
1861
1862 /*-----------------------------------------------------------------------*/
1863 /* FAT: Directory handling - Load/Store start cluster number */
1864 /*-----------------------------------------------------------------------*/
1865
1866 static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1867 FATFS* fs, /* Pointer to the fs object */
1868 const BYTE* dir /* Pointer to the key entry */
1869 )
1870 {
1871 DWORD cl;
1872
1873 cl = ld_word(dir + DIR_FstClusLO);
1874 if (fs->fs_type == FS_FAT32) {
1875 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;
1876 }
1877
1878 return cl;
1879 }
1880
1881
1882 #if !FF_FS_READONLY
1883 static void st_clust (
1884 FATFS* fs, /* Pointer to the fs object */
1885 BYTE* dir, /* Pointer to the key entry */
1886 DWORD cl /* Value to be set */
1887 )
1888 {
1889 st_word(dir + DIR_FstClusLO, (WORD)cl);
1890 if (fs->fs_type == FS_FAT32) {
1891 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
1892 }
1893 }
1894 #endif
1895
1896
1897
1898 #if FF_USE_LFN
1899 /*--------------------------------------------------------*/
1900 /* FAT-LFN: Compare a part of file name with an LFN entry */
1901 /*--------------------------------------------------------*/
1902
1903 static int cmp_lfn ( /* 1:matched, 0:not matched */
1904 const WCHAR* lfnbuf, /* Pointer to the LFN to be compared */
1905 BYTE* dir /* Pointer to the LFN entry */
1906 )
1907 {
1908 UINT ni, di;
1909 WCHAR pchr, chr;
1910
1911
1912 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check if LDIR_FstClusLO is 0 */
1913
1914 ni = (UINT)((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the name to be compared */
1915
1916 for (pchr = 1, di = 0; di < 13; di++) { /* Process all characters in the entry */
1917 chr = ld_word(dir + LfnOfs[di]); /* Pick a character from the entry */
1918 if (pchr != 0) {
1919 if (ni >= FF_MAX_LFN + 1 || ff_wtoupper(chr) != ff_wtoupper(lfnbuf[ni++])) { /* Compare it with name */
1920 return 0; /* Not matched */
1921 }
1922 pchr = chr;
1923 } else {
1924 if (chr != 0xFFFF) return 0; /* Check filler */
1925 }
1926 }
1927
1928 if ((dir[LDIR_Ord] & LLEF) && pchr && lfnbuf[ni]) return 0; /* Last name segment matched but different length */
1929
1930 return 1; /* The part of LFN matched */
1931 }
1932
1933
1934 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
1935 /*-----------------------------------------------------*/
1936 /* FAT-LFN: Pick a part of file name from an LFN entry */
1937 /*-----------------------------------------------------*/
1938
1939 static int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1940 WCHAR* lfnbuf, /* Pointer to the name buffer to be stored */
1941 const BYTE* dir /* Pointer to the LFN entry */
1942 )
1943 {
1944 UINT ni, di;
1945 WCHAR pchr, chr;
1946
1947
1948 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check if LDIR_FstClusLO is 0 */
1949
1950 ni = (UINT)((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the name buffer */
1951
1952 for (pchr = 1, di = 0; di < 13; di++) { /* Process all characters in the entry */
1953 chr = ld_word(dir + LfnOfs[di]); /* Pick a character from the entry */
1954 if (pchr != 0) {
1955 if (ni >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1956 lfnbuf[ni++] = pchr = chr; /* Store it */
1957 } else {
1958 if (chr != 0xFFFF) return 0; /* Check filler */
1959 }
1960 }
1961
1962 if (dir[LDIR_Ord] & LLEF && pchr != 0) { /* Put terminator if it is the last LFN part and not terminated */
1963 if (ni >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1964 lfnbuf[ni] = 0;
1965 }
1966
1967 return 1; /* The part of LFN is valid */
1968 }
1969 #endif
1970
1971
1972 #if !FF_FS_READONLY
1973 /*-----------------------------------------*/
1974 /* FAT-LFN: Create an entry of LFN entries */
1975 /*-----------------------------------------*/
1976
1977 static void put_lfn (
1978 const WCHAR* lfn, /* Pointer to the LFN */
1979 BYTE* dir, /* Pointer to the LFN entry to be created */
1980 BYTE ord, /* LFN order (1-20) */
1981 BYTE sum /* Checksum of the corresponding SFN */
1982 )
1983 {
1984 UINT ni, di;
1985 WCHAR chr;
1986
1987
1988 dir[LDIR_Chksum] = sum; /* Set checksum */
1989 dir[LDIR_Attr] = AM_LFN; /* Set attribute */
1990 dir[LDIR_Type] = 0;
1991 st_word(dir + LDIR_FstClusLO, 0);
1992
1993 ni = (UINT)(ord - 1) * 13; /* Offset in the name */
1994 di = chr = 0;
1995 do { /* Fill the directory entry */
1996 if (chr != 0xFFFF) chr = lfn[ni++]; /* Get an effective character */
1997 st_word(dir + LfnOfs[di], chr); /* Set it */
1998 if (chr == 0) chr = 0xFFFF; /* Padding characters after the terminator */
1999 } while (++di < 13);
2000 if (chr == 0xFFFF || !lfn[ni]) ord |= LLEF; /* Last LFN part is the start of an enrty set */
2001 dir[LDIR_Ord] = ord; /* Set order in the entry set */
2002 }
2003
2004 #endif /* !FF_FS_READONLY */
2005 #endif /* FF_USE_LFN */
2006
2007
2008
2009 #if FF_USE_LFN && !FF_FS_READONLY
2010 /*-----------------------------------------------------------------------*/
2011 /* FAT-LFN: Create a Numbered SFN */
2012 /*-----------------------------------------------------------------------*/
2013
2014 static void gen_numname (
2015 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
2016 const BYTE* src, /* Pointer to SFN in directory form */
2017 const WCHAR* lfn, /* Pointer to LFN */
2018 UINT seq /* Sequence number */
2019 )
2020 {
2021 BYTE ns[8], c;
2022 UINT i, j;
2023 WCHAR wc;
2024 DWORD crc_sreg;
2025
2026
2027 memcpy(dst, src, 11); /* Prepare the SFN to be modified */
2028
2029 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */
2030 crc_sreg = seq;
2031 while (*lfn) { /* Create a CRC value as a hash of LFN */
2032 wc = *lfn++;
2033 for (i = 0; i < 16; i++) {
2034 crc_sreg = (crc_sreg << 1) + (wc & 1);
2035 wc >>= 1;
2036 if (crc_sreg & 0x10000) crc_sreg ^= 0x11021;
2037 }
2038 }
2039 seq = (UINT)crc_sreg;
2040 }
2041
2042 /* Make suffix (~ + hexdecimal) */
2043 i = 7;
2044 do {
2045 c = (BYTE)((seq % 16) + '0'); seq /= 16;
2046 if (c > '9') c += 7;
2047 ns[i--] = c;
2048 } while (i && seq);
2049 ns[i] = '~';
2050
2051 /* Append the suffix to the SFN body */
2052 for (j = 0; j < i && dst[j] != ' '; j++) { /* Find the offset to append */
2053 if (dbc_1st(dst[j])) { /* To avoid DBC break up */
2054 if (j == i - 1) break;
2055 j++;
2056 }
2057 }
2058 do { /* Append the suffix */
2059 dst[j++] = (i < 8) ? ns[i++] : ' ';
2060 } while (j < 8);
2061 }
2062 #endif /* FF_USE_LFN && !FF_FS_READONLY */
2063
2064
2065
2066 #if FF_USE_LFN
2067 /*-----------------------------------------------------------------------*/
2068 /* FAT-LFN: Calculate checksum of an SFN entry */
2069 /*-----------------------------------------------------------------------*/
2070
2071 static BYTE sum_sfn (
2072 const BYTE* dir /* Pointer to the SFN entry */
2073 )
2074 {
2075 BYTE sum = 0;
2076 UINT n = 11;
2077
2078 do {
2079 sum = (sum >> 1) + (sum << 7) + *dir++;
2080 } while (--n);
2081 return sum;
2082 }
2083
2084 #endif /* FF_USE_LFN */
2085
2086
2087
2088 #if FF_FS_EXFAT
2089 /*-----------------------------------------------------------------------*/
2090 /* exFAT: Checksum */
2091 /*-----------------------------------------------------------------------*/
2092
2093 static WORD xdir_sum ( /* Get checksum of the directoly entry block */
2094 const BYTE* dir /* Directory entry block to be calculated */
2095 )
2096 {
2097 UINT i, szblk;
2098 WORD sum;
2099
2100
2101 szblk = ((UINT)dir[XDIR_NumSec] + 1) * SZDIRE; /* Number of bytes of the entry block */
2102 for (i = sum = 0; i < szblk; i++) {
2103 if (i == XDIR_SetSum) { /* Skip 2-byte sum field */
2104 i++;
2105 } else {
2106 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
2107 }
2108 }
2109 return sum;
2110 }
2111
2112
2113
2114 static WORD xname_sum ( /* Get check sum (to be used as hash) of the file name */
2115 const WCHAR* name /* File name to be calculated */
2116 )
2117 {
2118 WCHAR chr;
2119 WORD sum = 0;
2120
2121
2122 while ((chr = *name++) != 0) {
2123 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be up-case converted */
2124 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
2125 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
2126 }
2127 return sum;
2128 }
2129
2130
2131 #if !FF_FS_READONLY && FF_USE_MKFS
2132 static DWORD xsum32 ( /* Returns 32-bit checksum */
2133 BYTE dat, /* Byte to be calculated (byte-by-byte processing) */
2134 DWORD sum /* Previous sum value */
2135 )
2136 {
2137 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
2138 return sum;
2139 }
2140 #endif
2141
2142
2143
2144 /*------------------------------------*/
2145 /* exFAT: Get a directory entry block */
2146 /*------------------------------------*/
2147
2148 static FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
2149 DIR* dp /* Reading directory object pointing top of the entry block to load */
2150 )
2151 {
2152 FRESULT res;
2153 UINT i, sz_ent;
2154 BYTE *dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory directory entry block 85+C0+C1s */
2155
2156
2157 /* Load file-directory entry */
2158 res = move_window(dp->obj.fs, dp->sect);
2159 if (res != FR_OK) return res;
2160 if (dp->dir[XDIR_Type] != ET_FILEDIR) return FR_INT_ERR; /* Invalid order? */
2161 memcpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE);
2162 sz_ent = ((UINT)dirb[XDIR_NumSec] + 1) * SZDIRE; /* Size of this entry block */
2163 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR; /* Invalid block size? */
2164
2165 /* Load stream extension entry */
2166 res = dir_next(dp, 0);
2167 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2168 if (res != FR_OK) return res;
2169 res = move_window(dp->obj.fs, dp->sect);
2170 if (res != FR_OK) return res;
2171 if (dp->dir[XDIR_Type] != ET_STREAM) return FR_INT_ERR; /* Invalid order? */
2172 memcpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE);
2173 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR; /* Invalid block size for the name? */
2174
2175 /* Load file name entries */
2176 i = 2 * SZDIRE; /* Name offset to load */
2177 do {
2178 res = dir_next(dp, 0);
2179 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2180 if (res != FR_OK) return res;
2181 res = move_window(dp->obj.fs, dp->sect);
2182 if (res != FR_OK) return res;
2183 if (dp->dir[XDIR_Type] != ET_FILENAME) return FR_INT_ERR; /* Invalid order? */
2184 if (i < MAXDIRB(FF_MAX_LFN)) memcpy(dirb + i, dp->dir, SZDIRE); /* Load name entries only if the object is accessible */
2185 } while ((i += SZDIRE) < sz_ent);
2186
2187 /* Sanity check (do it for only accessible object) */
2188 if (i <= MAXDIRB(FF_MAX_LFN)) {
2189 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
2190 }
2191
2192 return FR_OK;
2193 }
2194
2195
2196 /*------------------------------------------------------------------*/
2197 /* exFAT: Initialize object allocation info with loaded entry block */
2198 /*------------------------------------------------------------------*/
2199
2200 static void init_alloc_info (
2201 FATFS* fs, /* Filesystem object */
2202 FFOBJID* obj /* Object allocation information to be initialized */
2203 )
2204 {
2205 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */
2206 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */
2207 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */
2208 obj->n_frag = 0; /* No last fragment info */
2209 }
2210
2211
2212
2213 #if !FF_FS_READONLY || FF_FS_RPATH != 0
2214 /*------------------------------------------------*/
2215 /* exFAT: Load the object's directory entry block */
2216 /*------------------------------------------------*/
2217
2218 static FRESULT load_obj_xdir (
2219 DIR* dp, /* Blank directory object to be used to access containing directory */
2220 const FFOBJID* obj /* Object with its containing directory information */
2221 )
2222 {
2223 FRESULT res;
2224
2225 /* Open object containing directory */
2226 dp->obj.fs = obj->fs;
2227 dp->obj.sclust = obj->c_scl;
2228 dp->obj.stat = (BYTE)obj->c_size;
2229 dp->obj.objsize = obj->c_size & 0xFFFFFF00;
2230 dp->obj.n_frag = 0;
2231 dp->blk_ofs = obj->c_ofs;
2232
2233 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */
2234 if (res == FR_OK) {
2235 res = load_xdir(dp); /* Load the object's entry block */
2236 }
2237 return res;
2238 }
2239 #endif
2240
2241
2242 #if !FF_FS_READONLY
2243 /*----------------------------------------*/
2244 /* exFAT: Store the directory entry block */
2245 /*----------------------------------------*/
2246
2247 static FRESULT store_xdir (
2248 DIR* dp /* Pointer to the directory object */
2249 )
2250 {
2251 FRESULT res;
2252 UINT nent;
2253 BYTE *dirb = dp->obj.fs->dirbuf; /* Pointer to the entry set 85+C0+C1s */
2254
2255
2256 st_word(dirb + XDIR_SetSum, xdir_sum(dirb)); /* Create check sum */
2257
2258 /* Store the entry set to the directory */
2259 nent = dirb[XDIR_NumSec] + 1; /* Number of entries */
2260 res = dir_sdi(dp, dp->blk_ofs); /* Top of the entry set */
2261 while (res == FR_OK) {
2262 /* Set an entry to the directory */
2263 res = move_window(dp->obj.fs, dp->sect);
2264 if (res != FR_OK) break;
2265 memcpy(dp->dir, dirb, SZDIRE);
2266 dp->obj.fs->wflag = 1;
2267
2268 if (--nent == 0) break; /* All done? */
2269 dirb += SZDIRE;
2270 res = dir_next(dp, 0); /* Next entry */
2271 }
2272 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
2273 }
2274
2275
2276
2277 /*-------------------------------------------*/
2278 /* exFAT: Create a new directory entry block */
2279 /*-------------------------------------------*/
2280
2281 static void create_xdir (
2282 BYTE* dirb, /* Pointer to the directory entry block buffer */
2283 const WCHAR* lfn /* Pointer to the object name */
2284 )
2285 {
2286 UINT i;
2287 BYTE n_c1, nlen;
2288 WCHAR chr;
2289
2290
2291 /* Create file-directory and stream-extension entry (1st and 2nd entry) */
2292 memset(dirb, 0, 2 * SZDIRE);
2293 dirb[0 * SZDIRE + XDIR_Type] = ET_FILEDIR;
2294 dirb[1 * SZDIRE + XDIR_Type] = ET_STREAM;
2295
2296 /* Create file name entries (3rd enrty and follows) */
2297 i = SZDIRE * 2; /* Top of file name entries */
2298 nlen = n_c1 = 0; chr = 1;
2299 do {
2300 dirb[i++] = ET_FILENAME; dirb[i++] = 0;
2301 do { /* Fill name field */
2302 if (chr != 0 && (chr = lfn[nlen]) != 0) nlen++; /* Get a character if exist */
2303 st_word(dirb + i, chr); /* Store it */
2304 i += 2;
2305 } while (i % SZDIRE != 0);
2306 n_c1++;
2307 } while (lfn[nlen]); /* Fill next C1 entry if any char follows */
2308
2309 dirb[XDIR_NumName] = nlen; /* Set name length */
2310 dirb[XDIR_NumSec] = 1 + n_c1; /* Set secondary count (C0 + C1s) */
2311 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
2312 }
2313
2314 #endif /* !FF_FS_READONLY */
2315 #endif /* FF_FS_EXFAT */
2316
2317
2318
2319 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
2320 /*-----------------------------------------------------------------------*/
2321 /* Read an object from the directory */
2322 /*-----------------------------------------------------------------------*/
2323
2324 #define DIR_READ_FILE(dp) dir_read(dp, 0)
2325 #define DIR_READ_LABEL(dp) dir_read(dp, 1)
2326
2327 static FRESULT dir_read (
2328 DIR* dp, /* Pointer to the directory object */
2329 int vol /* Filtered by 0:file/directory or 1:volume label */
2330 )
2331 {
2332 FRESULT res = FR_NO_FILE;
2333 FATFS *fs = dp->obj.fs;
2334 BYTE attr, b;
2335 #if FF_USE_LFN
2336 BYTE ord = 0xFF, sum = 0xFF;
2337 #endif
2338
2339 while (dp->sect) {
2340 res = move_window(fs, dp->sect);
2341 if (res != FR_OK) break;
2342 b = dp->dir[DIR_Name]; /* Test for the entry type */
2343 if (b == 0) {
2344 res = FR_NO_FILE; break; /* Reached to end of the directory */
2345 }
2346 #if FF_FS_EXFAT
2347 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2348 if (FF_USE_LABEL && vol) {
2349 if (b == ET_VLABEL) break; /* Volume label entry? */
2350 } else {
2351 if (b == ET_FILEDIR) { /* Start of the file entry block? */
2352 dp->blk_ofs = dp->dptr; /* Get location of the block */
2353 res = load_xdir(dp); /* Load the entry block */
2354 if (res == FR_OK) {
2355 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
2356 }
2357 break;
2358 }
2359 }
2360 } else
2361 #endif
2362 { /* On the FAT/FAT32 volume */
2363 dp->obj.attr = attr = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
2364 #if FF_USE_LFN /* LFN configuration */
2365 if (b == DDEM || b == '.' || (int)((attr & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
2366 ord = 0xFF;
2367 } else {
2368 if (attr == AM_LFN) { /* An LFN entry is found */
2369 if (b & LLEF) { /* Is it start of an LFN sequence? */
2370 sum = dp->dir[LDIR_Chksum];
2371 b &= (BYTE)~LLEF; ord = b;
2372 dp->blk_ofs = dp->dptr;
2373 }
2374 /* Check LFN validity and capture it */
2375 ord = (b == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2376 } else { /* An SFN entry is found */
2377 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
2378 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
2379 }
2380 break;
2381 }
2382 }
2383 #else /* Non LFN configuration */
2384 if (b != DDEM && b != '.' && attr != AM_LFN && (int)((attr & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */
2385 break;
2386 }
2387 #endif
2388 }
2389 res = dir_next(dp, 0); /* Next entry */
2390 if (res != FR_OK) break;
2391 }
2392
2393 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */
2394 return res;
2395 }
2396
2397 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */
2398
2399
2400
2401 /*-----------------------------------------------------------------------*/
2402 /* Directory handling - Find an object in the directory */
2403 /*-----------------------------------------------------------------------*/
2404
2405 static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
2406 DIR* dp /* Pointer to the directory object with the file name */
2407 )
2408 {
2409 FRESULT res;
2410 FATFS *fs = dp->obj.fs;
2411 BYTE c;
2412 #if FF_USE_LFN
2413 BYTE a, ord, sum;
2414 #endif
2415
2416 res = dir_sdi(dp, 0); /* Rewind directory object */
2417 if (res != FR_OK) return res;
2418 #if FF_FS_EXFAT
2419 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2420 BYTE nc;
2421 UINT di, ni;
2422 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
2423
2424 while ((res = DIR_READ_FILE(dp)) == FR_OK) { /* Read an item */
2425 #if FF_MAX_LFN < 255
2426 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */
2427 #endif
2428 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */
2429 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
2430 if ((di % SZDIRE) == 0) di += 2;
2431 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
2432 }
2433 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
2434 }
2435 return res;
2436 }
2437 #endif
2438 /* On the FAT/FAT32 volume */
2439 #if FF_USE_LFN
2440 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2441 #endif
2442 do {
2443 res = move_window(fs, dp->sect);
2444 if (res != FR_OK) break;
2445 c = dp->dir[DIR_Name];
2446 if (c == 0) { res = FR_NO_FILE; break; } /* Reached end of directory table */
2447 #if FF_USE_LFN /* LFN configuration */
2448 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
2449 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
2450 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2451 } else {
2452 if (a == AM_LFN) { /* Is it an LFN entry? */
2453 if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
2454 if (c & LLEF) { /* Is it start of an entry set? */
2455 c &= (BYTE)~LLEF;
2456 ord = c; /* Number of LFN entries */
2457 dp->blk_ofs = dp->dptr; /* Start offset of LFN */
2458 sum = dp->dir[LDIR_Chksum]; /* Sum of the SFN */
2459 }
2460 /* Check validity of the LFN entry and compare it with given name */
2461 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2462 }
2463 } else { /* SFN entry */
2464 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
2465 if (!(dp->fn[NSFLAG] & NS_LOSS) && !memcmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
2466 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Not matched, reset LFN sequence */
2467 }
2468 }
2469 #else /* Non LFN configuration */
2470 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
2471 if (!(dp->dir[DIR_Attr] & AM_VOL) && !memcmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
2472 #endif
2473 res = dir_next(dp, 0); /* Next entry */
2474 } while (res == FR_OK);
2475
2476 return res;
2477 }
2478
2479
2480
2481
2482 #if !FF_FS_READONLY
2483 /*-----------------------------------------------------------------------*/
2484 /* Register an object to the directory */
2485 /*-----------------------------------------------------------------------*/
2486
2487 static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
2488 DIR* dp /* Target directory with object name to be created */
2489 )
2490 {
2491 FRESULT res;
2492 FATFS *fs = dp->obj.fs;
2493 #if FF_USE_LFN /* LFN configuration */
2494 UINT n, len, n_ent;
2495 BYTE sn[12], sum;
2496
2497
2498 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
2499 for (len = 0; fs->lfnbuf[len]; len++) ; /* Get lfn length */
2500
2501 #if FF_FS_EXFAT
2502 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2503 n_ent = (len + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
2504 res = dir_alloc(dp, n_ent); /* Allocate directory entries */
2505 if (res != FR_OK) return res;
2506 dp->blk_ofs = dp->dptr - SZDIRE * (n_ent - 1); /* Set the allocated entry block offset */
2507
2508 if (dp->obj.stat & 4) { /* Has the directory been stretched by new allocation? */
2509 dp->obj.stat &= ~4;
2510 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */
2511 if (res != FR_OK) return res;
2512 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */
2513 if (res != FR_OK) return res;
2514 if (dp->obj.sclust != 0) { /* Is it a sub-directory? */
2515 DIR dj;
2516
2517 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */
2518 if (res != FR_OK) return res;
2519 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */
2520 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize);
2521 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
2522 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; /* Update the allocation status */
2523 res = store_xdir(&dj); /* Store the object status */
2524 if (res != FR_OK) return res;
2525 }
2526 }
2527
2528 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
2529 return FR_OK;
2530 }
2531 #endif
2532 /* On the FAT/FAT32 volume */
2533 memcpy(sn, dp->fn, 12);
2534 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
2535 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
2536 for (n = 1; n < 100; n++) {
2537 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */
2538 res = dir_find(dp); /* Check if the name collides with existing SFN */
2539 if (res != FR_OK) break;
2540 }
2541 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
2542 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
2543 dp->fn[NSFLAG] = sn[NSFLAG];
2544 }
2545
2546 /* Create an SFN with/without LFNs. */
2547 n_ent = (sn[NSFLAG] & NS_LFN) ? (len + 12) / 13 + 1 : 1; /* Number of entries to allocate */
2548 res = dir_alloc(dp, n_ent); /* Allocate entries */
2549 if (res == FR_OK && --n_ent) { /* Set LFN entry if needed */
2550 res = dir_sdi(dp, dp->dptr - n_ent * SZDIRE);
2551 if (res == FR_OK) {
2552 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
2553 do { /* Store LFN entries in bottom first */
2554 res = move_window(fs, dp->sect);
2555 if (res != FR_OK) break;
2556 put_lfn(fs->lfnbuf, dp->dir, (BYTE)n_ent, sum);
2557 fs->wflag = 1;
2558 res = dir_next(dp, 0); /* Next entry */
2559 } while (res == FR_OK && --n_ent);
2560 }
2561 }
2562
2563 #else /* Non LFN configuration */
2564 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
2565
2566 #endif
2567
2568 /* Set SFN entry */
2569 if (res == FR_OK) {
2570 res = move_window(fs, dp->sect);
2571 if (res == FR_OK) {
2572 memset(dp->dir, 0, SZDIRE); /* Clean the entry */
2573 memcpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
2574 #if FF_USE_LFN
2575 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
2576 #endif
2577 fs->wflag = 1;
2578 }
2579 }
2580
2581 return res;
2582 }
2583
2584 #endif /* !FF_FS_READONLY */
2585
2586
2587
2588 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0
2589 /*-----------------------------------------------------------------------*/
2590 /* Remove an object from the directory */
2591 /*-----------------------------------------------------------------------*/
2592
2593 static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
2594 DIR* dp /* Directory object pointing the entry to be removed */
2595 )
2596 {
2597 FRESULT res;
2598 FATFS *fs = dp->obj.fs;
2599 #if FF_USE_LFN /* LFN configuration */
2600 DWORD last = dp->dptr;
2601
2602 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
2603 if (res == FR_OK) {
2604 do {
2605 res = move_window(fs, dp->sect);
2606 if (res != FR_OK) break;
2607 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2608 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */
2609 } else { /* On the FAT/FAT32 volume */
2610 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */
2611 }
2612 fs->wflag = 1;
2613 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */
2614 res = dir_next(dp, 0); /* Next entry */
2615 } while (res == FR_OK);
2616 if (res == FR_NO_FILE) res = FR_INT_ERR;
2617 }
2618 #else /* Non LFN configuration */
2619
2620 res = move_window(fs, dp->sect);
2621 if (res == FR_OK) {
2622 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/
2623 fs->wflag = 1;
2624 }
2625 #endif
2626
2627 return res;
2628 }
2629
2630 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */
2631
2632
2633
2634 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
2635 /*-----------------------------------------------------------------------*/
2636 /* Get file information from directory entry */
2637 /*-----------------------------------------------------------------------*/
2638
2639 static void get_fileinfo (
2640 DIR* dp, /* Pointer to the directory object */
2641 FILINFO* fno /* Pointer to the file information to be filled */
2642 )
2643 {
2644 UINT si, di;
2645 #if FF_USE_LFN
2646 BYTE lcf;
2647 WCHAR wc, hs;
2648 FATFS *fs = dp->obj.fs;
2649 UINT nw;
2650 #else
2651 TCHAR c;
2652 #endif
2653
2654
2655 fno->fname[0] = 0; /* Invaidate file info */
2656 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */
2657
2658 #if FF_USE_LFN /* LFN configuration */
2659 #if FF_FS_EXFAT
2660 if (fs->fs_type == FS_EXFAT) { /* exFAT volume */
2661 UINT nc = 0;
2662
2663 si = SZDIRE * 2; di = 0; /* 1st C1 entry in the entry block */
2664 hs = 0;
2665 while (nc < fs->dirbuf[XDIR_NumName]) {
2666 if (si >= MAXDIRB(FF_MAX_LFN)) { /* Truncated directory block? */
2667 di = 0; break;
2668 }
2669 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
2670 wc = ld_word(fs->dirbuf + si); si += 2; nc++; /* Get a character */
2671 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2672 hs = wc; continue; /* Get low surrogate */
2673 }
2674 nw = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */
2675 if (nw == 0) { /* Buffer overflow or wrong char? */
2676 di = 0; break;
2677 }
2678 di += nw;
2679 hs = 0;
2680 }
2681 if (hs != 0) di = 0; /* Broken surrogate pair? */
2682 if (di == 0) fno->fname[di++] = '\?'; /* Inaccessible object name? */
2683 fno->fname[di] = 0; /* Terminate the name */
2684 fno->altname[0] = 0; /* exFAT does not support SFN */
2685
2686 fno->fattrib = fs->dirbuf[XDIR_Attr] & AM_MASKX; /* Attribute */
2687 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */
2688 fno->ftime = ld_word(fs->dirbuf + XDIR_ModTime + 0); /* Time */
2689 fno->fdate = ld_word(fs->dirbuf + XDIR_ModTime + 2); /* Date */
2690 return;
2691 } else
2692 #endif
2693 { /* FAT/FAT32 volume */
2694 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
2695 si = di = 0;
2696 hs = 0;
2697 while (fs->lfnbuf[si] != 0) {
2698 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */
2699 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2700 hs = wc; continue; /* Get low surrogate */
2701 }
2702 nw = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */
2703 if (nw == 0) { /* Buffer overflow or wrong char? */
2704 di = 0; break;
2705 }
2706 di += nw;
2707 hs = 0;
2708 }
2709 if (hs != 0) di = 0; /* Broken surrogate pair? */
2710 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */
2711 }
2712 }
2713
2714 si = di = 0;
2715 while (si < 11) { /* Get SFN from SFN entry */
2716 wc = dp->dir[si++]; /* Get a char */
2717 if (wc == ' ') continue; /* Skip padding spaces */
2718 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */
2719 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */
2720 #if FF_LFN_UNICODE >= 1 /* Unicode output */
2721 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */
2722 wc = wc << 8 | dp->dir[si++];
2723 }
2724 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */
2725 if (wc == 0) { /* Wrong char in the current code page? */
2726 di = 0; break;
2727 }
2728 nw = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in API encoding */
2729 if (nw == 0) { /* Buffer overflow? */
2730 di = 0; break;
2731 }
2732 di += nw;
2733 #else /* ANSI/OEM output */
2734 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */
2735 #endif
2736 }
2737 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */
2738
2739 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */
2740 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccessible */
2741 fno->fname[di++] = '\?';
2742 } else {
2743 for (si = di = 0, lcf = NS_BODY; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */
2744 wc = (WCHAR)fno->altname[si];
2745 if (wc == '.') lcf = NS_EXT;
2746 if (IsUpper(wc) && (dp->dir[DIR_NTres] & lcf)) wc += 0x20;
2747 fno->fname[di] = (TCHAR)wc;
2748 }
2749 }
2750 fno->fname[di] = 0; /* Terminate the LFN */
2751 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */
2752 }
2753
2754 #else /* Non-LFN configuration */
2755 si = di = 0;
2756 while (si < 11) { /* Copy name body and extension */
2757 c = (TCHAR)dp->dir[si++];
2758 if (c == ' ') continue; /* Skip padding spaces */
2759 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */
2760 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */
2761 fno->fname[di++] = c;
2762 }
2763 fno->fname[di] = 0; /* Terminate the SFN */
2764 #endif
2765
2766 fno->fattrib = dp->dir[DIR_Attr] & AM_MASK; /* Attribute */
2767 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
2768 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */
2769 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */
2770 }
2771
2772 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
2773
2774
2775
2776 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1
2777 /*-----------------------------------------------------------------------*/
2778 /* Pattern matching */
2779 /*-----------------------------------------------------------------------*/
2780
2781 #define FIND_RECURS 4 /* Maximum number of wildcard terms in the pattern to limit recursion */
2782
2783
2784 static DWORD get_achar ( /* Get a character and advance ptr */
2785 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */
2786 )
2787 {
2788 DWORD chr;
2789
2790
2791 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */
2792 chr = tchar2uni(ptr);
2793 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */
2794 chr = ff_wtoupper(chr);
2795
2796 #else /* ANSI/OEM input */
2797 chr = (BYTE)*(*ptr)++; /* Get a byte */
2798 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
2799 #if FF_CODE_PAGE == 0
2800 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper (SBCS extended char) */
2801 #elif FF_CODE_PAGE < 900
2802 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper (SBCS extended char) */
2803 #endif
2804 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900
2805 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */
2806 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0;
2807 }
2808 #endif
2809
2810 #endif
2811 return chr;
2812 }
2813
2814
2815 static int pattern_match ( /* 0:mismatched, 1:matched */
2816 const TCHAR* pat, /* Matching pattern */
2817 const TCHAR* nam, /* String to be tested */
2818 UINT skip, /* Number of pre-skip chars (number of ?s, b8:infinite (* specified)) */
2819 UINT recur /* Recursion count */
2820 )
2821 {
2822 const TCHAR *pptr;
2823 const TCHAR *nptr;
2824 DWORD pchr, nchr;
2825 UINT sk;
2826
2827
2828 while ((skip & 0xFF) != 0) { /* Pre-skip name chars */
2829 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
2830 skip--;
2831 }
2832 if (*pat == 0 && skip) return 1; /* Matched? (short circuit) */
2833
2834 do {
2835 pptr = pat; nptr = nam; /* Top of pattern and name to match */
2836 for (;;) {
2837 if (*pptr == '\?' || *pptr == '*') { /* Wildcard term? */
2838 if (recur == 0) return 0; /* Too many wildcard terms? */
2839 sk = 0;
2840 do { /* Analyze the wildcard term */
2841 if (*pptr++ == '\?') {
2842 sk++;
2843 } else {
2844 sk |= 0x100;
2845 }
2846 } while (*pptr == '\?' || *pptr == '*');
2847 if (pattern_match(pptr, nptr, sk, recur - 1)) return 1; /* Test new branch (recursive call) */
2848 nchr = *nptr; break; /* Branch mismatched */
2849 }
2850 pchr = get_achar(&pptr); /* Get a pattern char */
2851 nchr = get_achar(&nptr); /* Get a name char */
2852 if (pchr != nchr) break; /* Branch mismatched? */
2853 if (pchr == 0) return 1; /* Branch matched? (matched at end of both strings) */
2854 }
2855 get_achar(&nam); /* nam++ */
2856 } while (skip && nchr); /* Retry until end of name if infinite search is specified */
2857
2858 return 0;
2859 }
2860
2861 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */
2862
2863
2864
2865 /*-----------------------------------------------------------------------*/
2866 /* Pick a top segment and create the object name in directory form */
2867 /*-----------------------------------------------------------------------*/
2868
2869 static FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
2870 DIR* dp, /* Pointer to the directory object */
2871 const TCHAR** path /* Pointer to pointer to the segment in the path string */
2872 )
2873 {
2874 #if FF_USE_LFN /* LFN configuration */
2875 BYTE b, cf;
2876 WCHAR wc;
2877 WCHAR *lfn;
2878 const TCHAR* p;
2879 DWORD uc;
2880 UINT i, ni, si, di;
2881
2882
2883 /* Create LFN into LFN working buffer */
2884 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0;
2885 for (;;) {
2886 uc = tchar2uni(&p); /* Get a character */
2887 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */
2888 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */
2889 wc = (WCHAR)uc;
2890 if (wc < ' ' || IsSeparator(wc)) break; /* Break if end of the path or a separator is found */
2891 if (wc < 0x80 && strchr("*:<>|\"\?\x7F", (int)wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
2892 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */
2893 lfn[di++] = wc; /* Store the Unicode character */
2894 }
2895 if (wc < ' ') { /* Stopped at end of the path? */
2896 cf = NS_LAST; /* Last segment */
2897 } else { /* Stopped at a separator */
2898 while (IsSeparator(*p)) p++; /* Skip duplicated separators if exist */
2899 cf = 0; /* Next segment may follow */
2900 if (IsTerminator(*p)) cf = NS_LAST; /* Ignore terminating separator */
2901 }
2902 *path = p; /* Return pointer to the next segment */
2903
2904 #if FF_FS_RPATH != 0
2905 if ((di == 1 && lfn[di - 1] == '.') ||
2906 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
2907 lfn[di] = 0;
2908 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */
2909 dp->fn[i] = (i < di) ? '.' : ' ';
2910 }
2911 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
2912 return FR_OK;
2913 }
2914 #endif
2915 while (di) { /* Snip off trailing spaces and dots if exist */
2916 wc = lfn[di - 1];
2917 if (wc != ' ' && wc != '.') break;
2918 di--;
2919 }
2920 lfn[di] = 0; /* LFN is created into the working buffer */
2921 if (di == 0) return FR_INVALID_NAME; /* Reject null name */
2922
2923 /* Create SFN in directory form */
2924 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */
2925 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */
2926 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */
2927
2928 memset(dp->fn, ' ', 11);
2929 i = b = 0; ni = 8;
2930 for (;;) {
2931 wc = lfn[si++]; /* Get an LFN character */
2932 if (wc == 0) break; /* Break on end of the LFN */
2933 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */
2934 cf |= NS_LOSS | NS_LFN;
2935 continue;
2936 }
2937
2938 if (i >= ni || si == di) { /* End of field? */
2939 if (ni == 11) { /* Name extension overflow? */
2940 cf |= NS_LOSS | NS_LFN;
2941 break;
2942 }
2943 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */
2944 if (si > di) break; /* No name extension? */
2945 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */
2946 continue;
2947 }
2948
2949 if (wc >= 0x80) { /* Is this an extended character? */
2950 cf |= NS_LFN; /* LFN entry needs to be created */
2951 #if FF_CODE_PAGE == 0
2952 if (ExCvt) { /* In SBCS cfg */
2953 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2954 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2955 } else { /* In DBCS cfg */
2956 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Up-convert ==> ANSI/OEM code */
2957 }
2958 #elif FF_CODE_PAGE < 900 /* In SBCS cfg */
2959 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2960 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2961 #else /* In DBCS cfg */
2962 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Up-convert ==> ANSI/OEM code */
2963 #endif
2964 }
2965
2966 if (wc >= 0x100) { /* Is this a DBC? */
2967 if (i >= ni - 1) { /* Field overflow? */
2968 cf |= NS_LOSS | NS_LFN;
2969 i = ni; continue; /* Next field */
2970 }
2971 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */
2972 } else { /* SBC */
2973 if (wc == 0 || strchr("+,;=[]", (int)wc)) { /* Replace illegal characters for SFN */
2974 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2975 } else {
2976 if (IsUpper(wc)) { /* ASCII upper case? */
2977 b |= 2;
2978 }
2979 if (IsLower(wc)) { /* ASCII lower case? */
2980 b |= 1; wc -= 0x20;
2981 }
2982 }
2983 }
2984 dp->fn[i++] = (BYTE)wc;
2985 }
2986
2987 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2988
2989 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */
2990 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */
2991 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
2992 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */
2993 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */
2994 }
2995
2996 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */
2997
2998 return FR_OK;
2999
3000
3001 #else /* FF_USE_LFN : Non-LFN configuration */
3002 BYTE c, d;
3003 BYTE *sfn;
3004 UINT ni, si, i;
3005 const char *p;
3006
3007 /* Create file name in directory form */
3008 p = *path; sfn = dp->fn;
3009 memset(sfn, ' ', 11);
3010 si = i = 0; ni = 8;
3011 #if FF_FS_RPATH != 0
3012 if (p[si] == '.') { /* Is this a dot entry? */
3013 for (;;) {
3014 c = (BYTE)p[si++];
3015 if (c != '.' || si >= 3) break;
3016 sfn[i++] = c;
3017 }
3018 if (!IsSeparator(c) && c > ' ') return FR_INVALID_NAME;
3019 *path = p + si; /* Return pointer to the next segment */
3020 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */
3021 return FR_OK;
3022 }
3023 #endif
3024 for (;;) {
3025 c = (BYTE)p[si++]; /* Get a byte */
3026 if (c <= ' ') break; /* Break if end of the path name */
3027 if (IsSeparator(c)) { /* Break if a separator is found */
3028 while (IsSeparator(p[si])) si++; /* Skip duplicated separator if exist */
3029 break;
3030 }
3031 if (c == '.' || i >= ni) { /* End of body or field overflow? */
3032 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */
3033 i = 8; ni = 11; /* Enter file extension field */
3034 continue;
3035 }
3036 #if FF_CODE_PAGE == 0
3037 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */
3038 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
3039 }
3040 #elif FF_CODE_PAGE < 900
3041 if (c >= 0x80) { /* Is SBC extended character? */
3042 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
3043 }
3044 #endif
3045 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */
3046 d = (BYTE)p[si++]; /* Get 2nd byte */
3047 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */
3048 sfn[i++] = c;
3049 sfn[i++] = d;
3050 } else { /* SBC */
3051 if (strchr("*+,:;<=>[]|\"\?\x7F", (int)c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */
3052 if (IsLower(c)) c -= 0x20; /* To upper */
3053 sfn[i++] = c;
3054 }
3055 }
3056 *path = &p[si]; /* Return pointer to the next segment */
3057 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */
3058
3059 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
3060 sfn[NSFLAG] = (c <= ' ' || p[si] <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
3061
3062 return FR_OK;
3063 #endif /* FF_USE_LFN */
3064 }
3065
3066
3067
3068
3069 /*-----------------------------------------------------------------------*/
3070 /* Follow a file path */
3071 /*-----------------------------------------------------------------------*/
3072
3073 static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
3074 DIR* dp, /* Directory object to return last directory and found object */
3075 const TCHAR* path /* Full-path string to find a file or directory */
3076 )
3077 {
3078 FRESULT res;
3079 BYTE ns;
3080 FATFS *fs = dp->obj.fs;
3081
3082
3083 #if FF_FS_RPATH != 0
3084 if (!IsSeparator(*path) && (FF_STR_VOLUME_ID != 2 || !IsTerminator(*path))) { /* Without heading separator */
3085 dp->obj.sclust = fs->cdir; /* Start at the current directory */
3086 } else
3087 #endif
3088 { /* With heading separator */
3089 while (IsSeparator(*path)) path++; /* Strip separators */
3090 dp->obj.sclust = 0; /* Start from the root directory */
3091 }
3092 #if FF_FS_EXFAT
3093 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */
3094 #if FF_FS_RPATH != 0
3095 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */
3096 DIR dj;
3097
3098 dp->obj.c_scl = fs->cdc_scl;
3099 dp->obj.c_size = fs->cdc_size;
3100 dp->obj.c_ofs = fs->cdc_ofs;
3101 res = load_obj_xdir(&dj, &dp->obj);
3102 if (res != FR_OK) return res;
3103 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
3104 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
3105 }
3106 #endif
3107 #endif
3108
3109 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
3110 dp->fn[NSFLAG] = NS_NONAME;
3111 res = dir_sdi(dp, 0);
3112
3113 } else { /* Follow path */
3114 for (;;) {
3115 res = create_name(dp, &path); /* Get a segment name of the path */
3116 if (res != FR_OK) break;
3117 res = dir_find(dp); /* Find an object with the segment name */
3118 ns = dp->fn[NSFLAG];
3119 if (res != FR_OK) { /* Failed to find the object */
3120 if (res == FR_NO_FILE) { /* Object is not found */
3121 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */
3122 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
3123 dp->fn[NSFLAG] = NS_NONAME;
3124 res = FR_OK;
3125 } else { /* Could not find the object */
3126 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
3127 }
3128 }
3129 break;
3130 }
3131 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
3132 /* Get into the sub-directory */
3133 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */
3134 res = FR_NO_PATH; break;
3135 }
3136 #if FF_FS_EXFAT
3137 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */
3138 dp->obj.c_scl = dp->obj.sclust;
3139 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
3140 dp->obj.c_ofs = dp->blk_ofs;
3141 init_alloc_info(fs, &dp->obj); /* Open next directory */
3142 } else
3143 #endif
3144 {
3145 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */
3146 }
3147 }
3148 }
3149
3150 return res;
3151 }
3152
3153
3154
3155
3156 /*-----------------------------------------------------------------------*/
3157 /* Get logical drive number from path name */
3158 /*-----------------------------------------------------------------------*/
3159
3160 static int get_ldnumber ( /* Returns logical drive number (-1:invalid drive number or null pointer) */
3161 const TCHAR** path /* Pointer to pointer to the path name */
3162 )
3163 {
3164 const TCHAR *tp;
3165 const TCHAR *tt;
3166 TCHAR chr;
3167 int i;
3168 #if FF_STR_VOLUME_ID /* Find string volume ID */
3169 const char *vsp;
3170 char vchr;
3171 #endif
3172
3173 tt = tp = *path;
3174 if (!tp) return -1; /* Invalid path name? */
3175 do { /* Find a colon in the path */
3176 chr = *tt++;
3177 } while (!IsTerminator(chr) && chr != ':');
3178
3179 if (chr == ':') { /* Is there a DOS/Windows style volume ID? */
3180 i = FF_VOLUMES;
3181 if (IsDigit(*tp) && tp + 2 == tt) { /* Is it a numeric volume ID + colon? */
3182 i = (int)*tp - '0'; /* Get the logical drive number */
3183 }
3184 #if FF_STR_VOLUME_ID == 1 /* Arbitrary string volume ID is enabled */
3185 else {
3186 i = 0; /* Find volume ID string in the preconfigured table */
3187 do {
3188 vsp = VolumeStr[i]; tp = *path; /* Preconfigured string and path name to test */
3189 do { /* Compare the volume ID with path name in case-insensitive */
3190 vchr = *vsp++; chr = *tp++;
3191 if (IsLower(vchr)) vchr -= 0x20;
3192 if (IsLower(chr)) chr -= 0x20;
3193 } while (vchr && (TCHAR)vchr == chr);
3194 } while ((vchr || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */
3195 }
3196 #endif
3197 if (i >= FF_VOLUMES) return -1; /* Not found or invalid volume ID */
3198 *path = tt; /* Snip the drive prefix off */
3199 return i; /* Return the found drive number */
3200 }
3201 #if FF_STR_VOLUME_ID == 2 /* Unix style volume ID is enabled */
3202 if (*tp == '/') { /* Is there a volume ID? */
3203 while (*(tp + 1) == '/') tp++; /* Skip duplicated separator */
3204 i = 0;
3205 do {
3206 vsp = VolumeStr[i]; tt = tp; /* Preconfigured string and path name to test */
3207 do { /* Compare the volume ID with path name in case-insensitive */
3208 vchr = *vsp++; chr = *(++tt);
3209 if (IsLower(vchr)) vchr -= 0x20;
3210 if (IsLower(chr)) chr -= 0x20;
3211 } while (vchr && (TCHAR)vchr == chr);
3212 } while ((vchr || (chr != '/' && !IsTerminator(chr))) && ++i < FF_VOLUMES); /* Repeat for each ID until pattern match */
3213 if (i >= FF_VOLUMES) return -1; /* Not found (invalid volume ID) */
3214 *path = tt; /* Snip the node name off */
3215 return i; /* Return the found drive number */
3216 }
3217 #endif
3218 /* No drive prefix */
3219 #if FF_FS_RPATH != 0
3220 return (int)CurrVol; /* Default drive is current drive */
3221 #else
3222 return 0; /* Default drive is 0 */
3223 #endif
3224 }
3225
3226
3227
3228
3229 /*-----------------------------------------------------------------------*/
3230 /* GPT support functions */
3231 /*-----------------------------------------------------------------------*/
3232
3233 #if FF_LBA64
3234
3235 /* Calculate CRC32 in byte-by-byte */
3236
3237 static DWORD crc32 ( /* Returns next CRC value */
3238 DWORD crc, /* Current CRC value */
3239 BYTE d /* A byte to be processed */
3240 )
3241 {
3242 BYTE b;
3243
3244
3245 for (b = 1; b; b <<= 1) {
3246 crc ^= (d & b) ? 1 : 0;
3247 crc = (crc & 1) ? crc >> 1 ^ 0xEDB88320 : crc >> 1;
3248 }
3249 return crc;
3250 }
3251
3252
3253 /* Check validity of GPT header */
3254
3255 static int test_gpt_header ( /* 0:Invalid, 1:Valid */
3256 const BYTE* gpth /* Pointer to the GPT header */
3257 )
3258 {
3259 UINT i;
3260 DWORD bcc, hlen;
3261
3262
3263 if (memcmp(gpth + GPTH_Sign, "EFI PART" "\0\0\1", 12)) return 0; /* Check signature and version (1.0) */
3264 hlen = ld_dword(gpth + GPTH_Size); /* Check header size */
3265 if (hlen < 92 || hlen > FF_MIN_SS) return 0;
3266 for (i = 0, bcc = 0xFFFFFFFF; i < hlen; i++) { /* Check header BCC */
3267 bcc = crc32(bcc, i - GPTH_Bcc < 4 ? 0 : gpth[i]);
3268 }
3269 if (~bcc != ld_dword(gpth + GPTH_Bcc)) return 0;
3270 if (ld_dword(gpth + GPTH_PteSize) != SZ_GPTE) return 0; /* Table entry size (must be SZ_GPTE bytes) */
3271 if (ld_dword(gpth + GPTH_PtNum) > 128) return 0; /* Table size (must be 128 entries or less) */
3272
3273 return 1;
3274 }
3275
3276 #if !FF_FS_READONLY && FF_USE_MKFS
3277
3278 /* Generate a random value */
3279 static DWORD make_rand ( /* Returns a seed value for next */
3280 DWORD seed, /* Seed value */
3281 BYTE *buff, /* Output buffer */
3282 UINT n /* Data length */
3283 )
3284 {
3285 UINT r;
3286
3287
3288 if (seed == 0) seed = 1;
3289 do {
3290 for (r = 0; r < 8; r++) seed = seed & 1 ? seed >> 1 ^ 0xA3000000 : seed >> 1; /* Shift 8 bits the 32-bit LFSR */
3291 *buff++ = (BYTE)seed;
3292 } while (--n);
3293 return seed;
3294 }
3295
3296 #endif
3297 #endif
3298
3299
3300
3301 /*-----------------------------------------------------------------------*/
3302 /* Load a sector and check if it is an FAT VBR */
3303 /*-----------------------------------------------------------------------*/
3304
3305 /* Check what the sector is */
3306
3307 static UINT check_fs ( /* 0:FAT/FAT32 VBR, 1:exFAT VBR, 2:Not FAT and valid BS, 3:Not FAT and invalid BS, 4:Disk error */
3308 FATFS* fs, /* Filesystem object */
3309 LBA_t sect /* Sector to load and check if it is an FAT-VBR or not */
3310 )
3311 {
3312 WORD w, sign;
3313 BYTE b;
3314
3315
3316 fs->wflag = 0; fs->winsect = (LBA_t)0 - 1; /* Invaidate window */
3317 if (move_window(fs, sect) != FR_OK) return 4; /* Load the boot sector */
3318 sign = ld_word(fs->win + BS_55AA);
3319 #if FF_FS_EXFAT
3320 if (sign == 0xAA55 && !memcmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* It is an exFAT VBR */
3321 #endif
3322 b = fs->win[BS_JmpBoot];
3323 if (b == 0xEB || b == 0xE9 || b == 0xE8) { /* Valid JumpBoot code? (short jump, near jump or near call) */
3324 if (sign == 0xAA55 && !memcmp(fs->win + BS_FilSysType32, "FAT32 ", 8)) {
3325 return 0; /* It is an FAT32 VBR */
3326 }
3327 /* FAT volumes created in the early MS-DOS era lack BS_55AA and BS_FilSysType, so FAT VBR needs to be identified without them. */
3328 w = ld_word(fs->win + BPB_BytsPerSec);
3329 b = fs->win[BPB_SecPerClus];
3330 if ((w & (w - 1)) == 0 && w >= FF_MIN_SS && w <= FF_MAX_SS /* Properness of sector size (512-4096 and 2^n) */
3331 && b != 0 && (b & (b - 1)) == 0 /* Properness of cluster size (2^n) */
3332 && ld_word(fs->win + BPB_RsvdSecCnt) != 0 /* Properness of number of reserved sectors (MNBZ) */
3333 && (UINT)fs->win[BPB_NumFATs] - 1 <= 1 /* Properness of number of FATs (1 or 2) */
3334 && ld_word(fs->win + BPB_RootEntCnt) != 0 /* Properness of root dir size (MNBZ) */
3335 && (ld_word(fs->win + BPB_TotSec16) >= 128 || ld_dword(fs->win + BPB_TotSec32) >= 0x10000) /* Properness of volume size (>=128) */
3336 && ld_word(fs->win + BPB_FATSz16) != 0) { /* Properness of FAT size (MNBZ) */
3337 return 0; /* It can be presumed an FAT VBR */
3338 }
3339 }
3340 return sign == 0xAA55 ? 2 : 3; /* Not an FAT VBR (with valid or invalid BS) */
3341 }
3342
3343
3344 /* Find an FAT volume */
3345 /* (It supports only generic partitioning rules, MBR, GPT and SFD) */
3346
3347 static UINT find_volume ( /* Returns BS status found in the hosting drive */
3348 FATFS* fs, /* Filesystem object */
3349 UINT part /* Partition to fined = 0:find as SFD and partitions, >0:forced partition number */
3350 )
3351 {
3352 UINT fmt, i;
3353 DWORD mbr_pt[4];
3354
3355
3356 fmt = check_fs(fs, 0); /* Load sector 0 and check if it is an FAT VBR as SFD format */
3357 if (fmt != 2 && (fmt >= 3 || part == 0)) return fmt; /* Returns if it is an FAT VBR as auto scan, not a BS or disk error */
3358
3359 /* Sector 0 is not an FAT VBR or forced partition number wants a partition */
3360
3361 #if FF_LBA64
3362 if (fs->win[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */
3363 DWORD n_ent, v_ent, ofs;
3364 QWORD pt_lba;
3365
3366 if (move_window(fs, 1) != FR_OK) return 4; /* Load GPT header sector (next to MBR) */
3367 if (!test_gpt_header(fs->win)) return 3; /* Check if GPT header is valid */
3368 n_ent = ld_dword(fs->win + GPTH_PtNum); /* Number of entries */
3369 pt_lba = ld_qword(fs->win + GPTH_PtOfs); /* Table location */
3370 for (v_ent = i = 0; i < n_ent; i++) { /* Find FAT partition */
3371 if (move_window(fs, pt_lba + i * SZ_GPTE / SS(fs)) != FR_OK) return 4; /* PT sector */
3372 ofs = i * SZ_GPTE % SS(fs); /* Offset in the sector */
3373 if (!memcmp(fs->win + ofs + GPTE_PtGuid, GUID_MS_Basic, 16)) { /* MS basic data partition? */
3374 v_ent++;
3375 fmt = check_fs(fs, ld_qword(fs->win + ofs + GPTE_FstLba)); /* Load VBR and check status */
3376 if (part == 0 && fmt <= 1) return fmt; /* Auto search (valid FAT volume found first) */
3377 if (part != 0 && v_ent == part) return fmt; /* Forced partition order (regardless of it is valid or not) */
3378 }
3379 }
3380 return 3; /* Not found */
3381 }
3382 #endif
3383 if (FF_MULTI_PARTITION && part > 4) return 3; /* MBR has 4 partitions max */
3384 for (i = 0; i < 4; i++) { /* Load partition offset in the MBR */
3385 mbr_pt[i] = ld_dword(fs->win + MBR_Table + i * SZ_PTE + PTE_StLba);
3386 }
3387 i = part ? part - 1 : 0; /* Table index to find first */
3388 do { /* Find an FAT volume */
3389 fmt = mbr_pt[i] ? check_fs(fs, mbr_pt[i]) : 3; /* Check if the partition is FAT */
3390 } while (part == 0 && fmt >= 2 && ++i < 4);
3391 return fmt;
3392 }
3393
3394
3395
3396
3397 /*-----------------------------------------------------------------------*/
3398 /* Determine logical drive number and mount the volume if needed */
3399 /*-----------------------------------------------------------------------*/
3400
3401 static FRESULT mount_volume ( /* FR_OK(0): successful, !=0: an error occurred */
3402 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
3403 FATFS** rfs, /* Pointer to pointer to the found filesystem object */
3404 BYTE mode /* Desiered access mode to check write protection */
3405 )
3406 {
3407 int vol;
3408 FATFS *fs;
3409 DSTATUS stat;
3410 LBA_t bsect;
3411 DWORD tsect, sysect, fasize, nclst, szbfat;
3412 WORD nrsv;
3413 UINT fmt;
3414
3415
3416 /* Get logical drive number */
3417 *rfs = 0;
3418 vol = get_ldnumber(path);
3419 if (vol < 0) return FR_INVALID_DRIVE;
3420
3421 /* Check if the filesystem object is valid or not */
3422 fs = FatFs[vol]; /* Get pointer to the filesystem object */
3423 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */
3424 #if FF_FS_REENTRANT
3425 if (!lock_volume(fs, 1)) return FR_TIMEOUT; /* Lock the volume, and system if needed */
3426 #endif
3427 *rfs = fs; /* Return pointer to the filesystem object */
3428
3429 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */
3430 if (fs->fs_type != 0) { /* If the volume has been mounted */
3431 stat = disk_status(fs->pdrv);
3432 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
3433 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */
3434 return FR_WRITE_PROTECTED;
3435 }
3436 return FR_OK; /* The filesystem object is already valid */
3437 }
3438 }
3439
3440 /* The filesystem object is not valid. */
3441 /* Following code attempts to mount the volume. (find an FAT volume, analyze the BPB and initialize the filesystem object) */
3442
3443 fs->fs_type = 0; /* Invalidate the filesystem object */
3444 stat = disk_initialize(fs->pdrv); /* Initialize the volume hosting physical drive */
3445 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
3446 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
3447 }
3448 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */
3449 return FR_WRITE_PROTECTED;
3450 }
3451 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */
3452 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;
3453 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;
3454 #endif
3455
3456 /* Find an FAT volume on the hosting drive */
3457 fmt = find_volume(fs, LD2PT(vol));
3458 if (fmt == 4) return FR_DISK_ERR; /* An error occurred in the disk I/O layer */
3459 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */
3460 bsect = fs->winsect; /* Volume offset in the hosting physical drive */
3461
3462 /* An FAT volume is found (bsect). Following code initializes the filesystem object */
3463
3464 #if FF_FS_EXFAT
3465 if (fmt == 1) {
3466 QWORD maxlba;
3467 DWORD so, cv, bcl, i;
3468
3469 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */
3470 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
3471
3472 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */
3473
3474 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */
3475 return FR_NO_FILESYSTEM;
3476 }
3477
3478 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA of the volume + 1 */
3479 if (!FF_LBA64 && maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be accessed in 32-bit LBA) */
3480
3481 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */
3482
3483 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */
3484 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */
3485
3486 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */
3487 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768 sectors) */
3488
3489 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */
3490 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */
3491 fs->n_fatent = nclst + 2;
3492
3493 /* Boundaries and Limits */
3494 fs->volbase = bsect;
3495 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
3496 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
3497 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size required) */
3498 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
3499
3500 /* Get bitmap location and check if it is contiguous (implementation assumption) */
3501 so = i = 0;
3502 for (;;) { /* Find the bitmap entry in the root directory (in only first cluster) */
3503 if (i == 0) {
3504 if (so >= fs->csize) return FR_NO_FILESYSTEM; /* Not found? */
3505 if (move_window(fs, clst2sect(fs, (DWORD)fs->dirbase) + so) != FR_OK) return FR_DISK_ERR;
3506 so++;
3507 }
3508 if (fs->win[i] == ET_BITMAP) break; /* Is it a bitmap entry? */
3509 i = (i + SZDIRE) % SS(fs); /* Next entry */
3510 }
3511 bcl = ld_dword(fs->win + i + 20); /* Bitmap cluster */
3512 if (bcl < 2 || bcl >= fs->n_fatent) return FR_NO_FILESYSTEM; /* (Wrong cluster#) */
3513 fs->bitbase = fs->database + fs->csize * (bcl - 2); /* Bitmap sector */
3514 for (;;) { /* Check if bitmap is contiguous */
3515 if (move_window(fs, fs->fatbase + bcl / (SS(fs) / 4)) != FR_OK) return FR_DISK_ERR;
3516 cv = ld_dword(fs->win + bcl % (SS(fs) / 4) * 4);
3517 if (cv == 0xFFFFFFFF) break; /* Last link? */
3518 if (cv != ++bcl) return FR_NO_FILESYSTEM; /* Fragmented bitmap? */
3519 }
3520
3521 #if !FF_FS_READONLY
3522 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Invalidate cluster allocation information */
3523 fs->fsi_flag = 0; /* Enable to sync PercInUse value in VBR */
3524 #endif
3525 fmt = FS_EXFAT; /* FAT sub-type */
3526 } else
3527 #endif /* FF_FS_EXFAT */
3528 {
3529 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */
3530
3531 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
3532 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
3533 fs->fsize = fasize;
3534
3535 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */
3536 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
3537 fasize *= fs->n_fats; /* Number of sectors for FAT area */
3538
3539 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */
3540 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
3541
3542 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
3543 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */
3544
3545 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
3546 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
3547
3548 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
3549 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */
3550
3551 /* Determine the FAT sub type */
3552 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */
3553 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3554 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
3555 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3556 fmt = 0;
3557 if (nclst <= MAX_FAT32) fmt = FS_FAT32;
3558 if (nclst <= MAX_FAT16) fmt = FS_FAT16;
3559 if (nclst <= MAX_FAT12) fmt = FS_FAT12;
3560 if (fmt == 0) return FR_NO_FILESYSTEM;
3561
3562 /* Boundaries and Limits */
3563 fs->n_fatent = nclst + 2; /* Number of FAT entries */
3564 fs->volbase = bsect; /* Volume start sector */
3565 fs->fatbase = bsect + nrsv; /* FAT start sector */
3566 fs->database = bsect + sysect; /* Data start sector */
3567 if (fmt == FS_FAT32) {
3568 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */
3569 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
3570 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */
3571 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
3572 } else {
3573 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
3574 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
3575 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
3576 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
3577 }
3578 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */
3579
3580 #if !FF_FS_READONLY
3581 /* Get FSInfo if available */
3582 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Invalidate cluster allocation information */
3583 fs->fsi_flag = 0x80; /* Disable FSInfo by default */
3584 if (fmt == FS_FAT32
3585 && ld_word(fs->win + BPB_FSInfo32) == 1 /* FAT32: Enable FSInfo feature only if FSInfo sector is next to VBR */
3586 && move_window(fs, bsect + 1) == FR_OK)
3587 {
3588 fs->fsi_flag = 0;
3589 if ( ld_dword(fs->win + FSI_LeadSig) == 0x41615252 /* Load FSInfo data if available */
3590 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272
3591 && ld_dword(fs->win + FSI_TrailSig) == 0xAA550000)
3592 {
3593 #if (FF_FS_NOFSINFO & 1) == 0 /* Get free cluster count if trust it */
3594 fs->free_clst = ld_dword(fs->win + FSI_Free_Count);
3595 #endif
3596 #if (FF_FS_NOFSINFO & 2) == 0 /* Get next free cluster if rtust it */
3597 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
3598 #endif
3599 }
3600 }
3601 #endif /* !FF_FS_READONLY */
3602 }
3603
3604 fs->fs_type = (BYTE)fmt;/* FAT sub-type (the filesystem object gets valid) */
3605 fs->id = ++Fsid; /* Volume mount ID */
3606 #if FF_USE_LFN == 1
3607 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */
3608 #if FF_FS_EXFAT
3609 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */
3610 #endif
3611 #endif
3612 #if FF_FS_RPATH != 0
3613 fs->cdir = 0; /* Initialize current directory */
3614 #endif
3615 #if FF_FS_LOCK /* Clear file lock semaphores */
3616 clear_share(fs);
3617 #endif
3618 return FR_OK;
3619 }
3620
3621
3622
3623
3624 /*-----------------------------------------------------------------------*/
3625 /* Check if the file/directory object is valid or not */
3626 /*-----------------------------------------------------------------------*/
3627
3628 static FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */
3629 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/DIR structure, to check validity */
3630 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */
3631 )
3632 {
3633 FRESULT res = FR_INVALID_OBJECT;
3634
3635
3636 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */
3637 #if FF_FS_REENTRANT
3638 if (lock_volume(obj->fs, 0)) { /* Take a grant to access the volume */
3639 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the hosting physical drive is kept initialized */
3640 res = FR_OK;
3641 } else {
3642 unlock_volume(obj->fs, FR_OK); /* Invalidated volume, abort to access */
3643 }
3644 } else { /* Could not take */
3645 res = FR_TIMEOUT;
3646 }
3647 #else
3648 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the hosting physical drive is kept initialized */
3649 res = FR_OK;
3650 }
3651 #endif
3652 }
3653 *rfs = (res == FR_OK) ? obj->fs : 0; /* Return corresponding filesystem object if it is valid */
3654 return res;
3655 }
3656
3657
3658
3659
3660 /*---------------------------------------------------------------------------
3661
3662 Public Functions (FatFs API)
3663
3664 ----------------------------------------------------------------------------*/
3665
3666
3667
3668 /*-----------------------------------------------------------------------*/
3669 /* Mount/Unmount a Logical Drive */
3670 /*-----------------------------------------------------------------------*/
3671
3672 FRESULT f_mount (
3673 FATFS* fs, /* Pointer to the filesystem object to be registered (NULL:unmount)*/
3674 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
3675 BYTE opt /* Mount option: 0=Do not mount (delayed mount), 1=Mount immediately */
3676 )
3677 {
3678 FATFS *cfs;
3679 int vol;
3680 FRESULT res;
3681 const TCHAR *rp = path;
3682
3683
3684 /* Get volume ID (logical drive number) */
3685 vol = get_ldnumber(&rp);
3686 if (vol < 0) return FR_INVALID_DRIVE;
3687 cfs = FatFs[vol]; /* Pointer to the filesystem object of the volume */
3688
3689 if (cfs) { /* Unregister current filesystem object if registered */
3690 FatFs[vol] = 0;
3691 #if FF_FS_LOCK
3692 clear_share(cfs);
3693 #endif
3694 #if FF_FS_REENTRANT /* Discard mutex of the current volume */
3695 ff_mutex_delete(vol);
3696 #endif
3697 cfs->fs_type = 0; /* Invalidate the filesystem object to be unregistered */
3698 }
3699
3700 if (fs) { /* Register new filesystem object */
3701 fs->pdrv = LD2PD(vol); /* Volume hosting physical drive */
3702 #if FF_FS_REENTRANT /* Create a volume mutex */
3703 fs->ldrv = (BYTE)vol; /* Owner volume ID */
3704 if (!ff_mutex_create(vol)) return FR_INT_ERR;
3705 #if FF_FS_LOCK
3706 if (SysLock == 0) { /* Create a system mutex if needed */
3707 if (!ff_mutex_create(FF_VOLUMES)) {
3708 ff_mutex_delete(vol);
3709 return FR_INT_ERR;
3710 }
3711 SysLock = 1; /* System mutex is ready */
3712 }
3713 #endif
3714 #endif
3715 fs->fs_type = 0; /* Invalidate the new filesystem object */
3716 FatFs[vol] = fs; /* Register new fs object */
3717 }
3718
3719 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted in subsequent file functions */
3720
3721 res = mount_volume(&path, &fs, 0); /* Force mounted the volume */
3722 LEAVE_FF(fs, res);
3723 }
3724
3725
3726
3727
3728 /*-----------------------------------------------------------------------*/
3729 /* Open or Create a File */
3730 /*-----------------------------------------------------------------------*/
3731
3732 FRESULT f_open (
3733 FIL* fp, /* Pointer to the blank file object */
3734 const TCHAR* path, /* Pointer to the file name */
3735 BYTE mode /* Access mode and open mode flags */
3736 )
3737 {
3738 FRESULT res;
3739 DIR dj;
3740 FATFS *fs;
3741 #if !FF_FS_READONLY
3742 DWORD cl, bcs, clst, tm;
3743 LBA_t sc;
3744 FSIZE_t ofs;
3745 #endif
3746 DEF_NAMBUF
3747
3748
3749 if (!fp) return FR_INVALID_OBJECT;
3750
3751 /* Get logical drive number */
3752 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND;
3753 res = mount_volume(&path, &fs, mode);
3754 if (res == FR_OK) {
3755 dj.obj.fs = fs;
3756 INIT_NAMBUF(fs);
3757 res = follow_path(&dj, path); /* Follow the file path */
3758 #if !FF_FS_READONLY /* Read/Write configuration */
3759 if (res == FR_OK) {
3760 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
3761 res = FR_INVALID_NAME;
3762 }
3763 #if FF_FS_LOCK
3764 else {
3765 res = chk_share(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */
3766 }
3767 #endif
3768 }
3769 /* Create or Open a file */
3770 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
3771 if (res != FR_OK) { /* No file, create new */
3772 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */
3773 #if FF_FS_LOCK
3774 res = enq_share() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
3775 #else
3776 res = dir_register(&dj);
3777 #endif
3778 }
3779 mode |= FA_CREATE_ALWAYS; /* File is created */
3780 }
3781 else { /* Any object with the same name is already existing */
3782 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
3783 res = FR_DENIED;
3784 } else {
3785 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */
3786 }
3787 }
3788 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */
3789 #if FF_FS_EXFAT
3790 if (fs->fs_type == FS_EXFAT) {
3791 /* Get current allocation info */
3792 fp->obj.fs = fs;
3793 init_alloc_info(fs, &fp->obj);
3794 /* Set directory entry block initial state */
3795 memset(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */
3796 memset(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */
3797 fs->dirbuf[XDIR_Attr] = AM_ARC;
3798 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME());
3799 fs->dirbuf[XDIR_GenFlags] = 1;
3800 res = store_xdir(&dj);
3801 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */
3802 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
3803 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */
3804 }
3805 } else
3806 #endif
3807 {
3808 /* Set directory entry initial state */
3809 tm = GET_FATTIME(); /* Set created time */
3810 st_dword(dj.dir + DIR_CrtTime, tm);
3811 st_dword(dj.dir + DIR_ModTime, tm);
3812 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */
3813 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */
3814 st_clust(fs, dj.dir, 0); /* Reset file allocation info */
3815 st_dword(dj.dir + DIR_FileSize, 0);
3816 fs->wflag = 1;
3817 if (cl != 0) { /* Remove the cluster chain if exist */
3818 sc = fs->winsect;
3819 res = remove_chain(&dj.obj, cl, 0);
3820 if (res == FR_OK) {
3821 res = move_window(fs, sc);
3822 fs->last_clst = cl - 1; /* Reuse the cluster hole */
3823 }
3824 }
3825 }
3826 }
3827 }
3828 else { /* Open an existing file */
3829 if (res == FR_OK) { /* Is the object exsiting? */
3830 if (dj.obj.attr & AM_DIR) { /* File open against a directory */
3831 res = FR_NO_FILE;
3832 } else {
3833 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */
3834 res = FR_DENIED;
3835 }
3836 }
3837 }
3838 }
3839 if (res == FR_OK) {
3840 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */
3841 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */
3842 fp->dir_ptr = dj.dir;
3843 #if FF_FS_LOCK
3844 fp->obj.lockid = inc_share(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */
3845 if (fp->obj.lockid == 0) res = FR_INT_ERR;
3846 #endif
3847 }
3848 #else /* R/O configuration */
3849 if (res == FR_OK) {
3850 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */
3851 res = FR_INVALID_NAME;
3852 } else {
3853 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */
3854 res = FR_NO_FILE;
3855 }
3856 }
3857 }
3858 #endif
3859
3860 if (res == FR_OK) {
3861 #if FF_FS_EXFAT
3862 if (fs->fs_type == FS_EXFAT) {
3863 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */
3864 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
3865 fp->obj.c_ofs = dj.blk_ofs;
3866 init_alloc_info(fs, &fp->obj);
3867 } else
3868 #endif
3869 {
3870 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */
3871 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
3872 }
3873 #if FF_USE_FASTSEEK
3874 fp->cltbl = 0; /* Disable fast seek mode */
3875 #endif
3876 fp->obj.fs = fs; /* Validate the file object */
3877 fp->obj.id = fs->id;
3878 fp->flag = mode; /* Set file access mode */
3879 fp->err = 0; /* Clear error flag */
3880 fp->sect = 0; /* Invalidate current data sector */
3881 fp->fptr = 0; /* Set file pointer top of the file */
3882 #if !FF_FS_READONLY
3883 #if !FF_FS_TINY
3884 memset(fp->buf, 0, sizeof fp->buf); /* Clear sector buffer */
3885 #endif
3886 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */
3887 fp->fptr = fp->obj.objsize; /* Offset to seek */
3888 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */
3889 clst = fp->obj.sclust; /* Follow the cluster chain */
3890 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
3891 clst = get_fat(&fp->obj, clst);
3892 if (clst <= 1) res = FR_INT_ERR;
3893 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
3894 }
3895 fp->clust = clst;
3896 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */
3897 sc = clst2sect(fs, clst);
3898 if (sc == 0) {
3899 res = FR_INT_ERR;
3900 } else {
3901 fp->sect = sc + (DWORD)(ofs / SS(fs));
3902 #if !FF_FS_TINY
3903 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
3904 #endif
3905 }
3906 }
3907 #if FF_FS_LOCK
3908 if (res != FR_OK) dec_share(fp->obj.lockid); /* Decrement file open counter if seek failed */
3909 #endif
3910 }
3911 #endif
3912 }
3913
3914 FREE_NAMBUF();
3915 }
3916
3917 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */
3918
3919 LEAVE_FF(fs, res);
3920 }
3921
3922
3923
3924
3925 /*-----------------------------------------------------------------------*/
3926 /* Read File */
3927 /*-----------------------------------------------------------------------*/
3928
3929 FRESULT f_read (
3930 FIL* fp, /* Open file to be read */
3931 void* buff, /* Data buffer to store the read data */
3932 UINT btr, /* Number of bytes to read */
3933 UINT* br /* Number of bytes read */
3934 )
3935 {
3936 FRESULT res;
3937 FATFS *fs;
3938 DWORD clst;
3939 LBA_t sect;
3940 FSIZE_t remain;
3941 UINT rcnt, cc, csect;
3942 BYTE *rbuff = (BYTE*)buff;
3943
3944
3945 *br = 0; /* Clear read byte counter */
3946 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3947 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3948 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3949 remain = fp->obj.objsize - fp->fptr;
3950 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3951
3952 for ( ; btr > 0; btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) { /* Repeat until btr bytes read */
3953 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3954 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
3955 if (csect == 0) { /* On the cluster boundary? */
3956 if (fp->fptr == 0) { /* On the top of the file? */
3957 clst = fp->obj.sclust; /* Follow cluster chain from the origin */
3958 } else { /* Middle or end of the file */
3959 #if FF_USE_FASTSEEK
3960 if (fp->cltbl) {
3961 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3962 } else
3963 #endif
3964 {
3965 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */
3966 }
3967 }
3968 if (clst < 2) ABORT(fs, FR_INT_ERR);
3969 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3970 fp->clust = clst; /* Update current cluster */
3971 }
3972 sect = clst2sect(fs, fp->clust); /* Get current sector */
3973 if (sect == 0) ABORT(fs, FR_INT_ERR);
3974 sect += csect;
3975 cc = btr / SS(fs); /* When remaining bytes >= sector size, */
3976 if (cc > 0) { /* Read maximum contiguous sectors directly */
3977 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3978 cc = fs->csize - csect;
3979 }
3980 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3981 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
3982 #if FF_FS_TINY
3983 if (fs->wflag && fs->winsect - sect < cc) {
3984 memcpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
3985 }
3986 #else
3987 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
3988 memcpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
3989 }
3990 #endif
3991 #endif
3992 rcnt = SS(fs) * cc; /* Number of bytes transferred */
3993 continue;
3994 }
3995 #if !FF_FS_TINY
3996 if (fp->sect != sect) { /* Load data sector if not in cache */
3997 #if !FF_FS_READONLY
3998 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3999 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4000 fp->flag &= (BYTE)~FA_DIRTY;
4001 }
4002 #endif
4003 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
4004 }
4005 #endif
4006 fp->sect = sect;
4007 }
4008 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
4009 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */
4010 #if FF_FS_TINY
4011 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
4012 memcpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
4013 #else
4014 memcpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
4015 #endif
4016 }
4017
4018 LEAVE_FF(fs, FR_OK);
4019 }
4020
4021
4022
4023
4024 #if !FF_FS_READONLY
4025 /*-----------------------------------------------------------------------*/
4026 /* Write File */
4027 /*-----------------------------------------------------------------------*/
4028
4029 FRESULT f_write (
4030 FIL* fp, /* Open file to be written */
4031 const void* buff, /* Data to be written */
4032 UINT btw, /* Number of bytes to write */
4033 UINT* bw /* Number of bytes written */
4034 )
4035 {
4036 FRESULT res;
4037 FATFS *fs;
4038 DWORD clst;
4039 LBA_t sect;
4040 UINT wcnt, cc, csect;
4041 const BYTE *wbuff = (const BYTE*)buff;
4042
4043
4044 *bw = 0; /* Clear write byte counter */
4045 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4046 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
4047 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4048
4049 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */
4050 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
4051 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
4052 }
4053
4054 for ( ; btw > 0; btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) { /* Repeat until all data written */
4055 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
4056 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */
4057 if (csect == 0) { /* On the cluster boundary? */
4058 if (fp->fptr == 0) { /* On the top of the file? */
4059 clst = fp->obj.sclust; /* Follow from the origin */
4060 if (clst == 0) { /* If no cluster is allocated, */
4061 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */
4062 }
4063 } else { /* On the middle or end of the file */
4064 #if FF_USE_FASTSEEK
4065 if (fp->cltbl) {
4066 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
4067 } else
4068 #endif
4069 {
4070 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */
4071 }
4072 }
4073 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
4074 if (clst == 1) ABORT(fs, FR_INT_ERR);
4075 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4076 fp->clust = clst; /* Update current cluster */
4077 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */
4078 }
4079 #if FF_FS_TINY
4080 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */
4081 #else
4082 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
4083 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4084 fp->flag &= (BYTE)~FA_DIRTY;
4085 }
4086 #endif
4087 sect = clst2sect(fs, fp->clust); /* Get current sector */
4088 if (sect == 0) ABORT(fs, FR_INT_ERR);
4089 sect += csect;
4090 cc = btw / SS(fs); /* When remaining bytes >= sector size, */
4091 if (cc > 0) { /* Write maximum contiguous sectors directly */
4092 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
4093 cc = fs->csize - csect;
4094 }
4095 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
4096 #if FF_FS_MINIMIZE <= 2
4097 #if FF_FS_TINY
4098 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
4099 memcpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
4100 fs->wflag = 0;
4101 }
4102 #else
4103 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
4104 memcpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
4105 fp->flag &= (BYTE)~FA_DIRTY;
4106 }
4107 #endif
4108 #endif
4109 wcnt = SS(fs) * cc; /* Number of bytes transferred */
4110 continue;
4111 }
4112 #if FF_FS_TINY
4113 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */
4114 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
4115 fs->winsect = sect;
4116 }
4117 #else
4118 if (fp->sect != sect && /* Fill sector cache with file data */
4119 fp->fptr < fp->obj.objsize &&
4120 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) {
4121 ABORT(fs, FR_DISK_ERR);
4122 }
4123 #endif
4124 fp->sect = sect;
4125 }
4126 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
4127 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */
4128 #if FF_FS_TINY
4129 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
4130 memcpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
4131 fs->wflag = 1;
4132 #else
4133 memcpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
4134 fp->flag |= FA_DIRTY;
4135 #endif
4136 }
4137
4138 fp->flag |= FA_MODIFIED; /* Set file change flag */
4139
4140 LEAVE_FF(fs, FR_OK);
4141 }
4142
4143
4144
4145
4146 /*-----------------------------------------------------------------------*/
4147 /* Synchronize the File */
4148 /*-----------------------------------------------------------------------*/
4149
4150 FRESULT f_sync (
4151 FIL* fp /* Open file to be synced */
4152 )
4153 {
4154 FRESULT res;
4155 FATFS *fs;
4156 DWORD tm;
4157 BYTE *dir;
4158
4159
4160 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4161 if (res == FR_OK) {
4162 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
4163 #if !FF_FS_TINY
4164 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
4165 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
4166 fp->flag &= (BYTE)~FA_DIRTY;
4167 }
4168 #endif
4169 /* Update the directory entry */
4170 tm = GET_FATTIME(); /* Modified time */
4171 #if FF_FS_EXFAT
4172 if (fs->fs_type == FS_EXFAT) {
4173 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */
4174 if (res == FR_OK) {
4175 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4176 }
4177 if (res == FR_OK) {
4178 DIR dj;
4179 DEF_NAMBUF
4180
4181 INIT_NAMBUF(fs);
4182 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */
4183 if (res == FR_OK) {
4184 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4185 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */
4186 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); /* Update start cluster */
4187 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); /* Update file size */
4188 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); /* (FatFs does not support Valid File Size feature) */
4189 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */
4190 fs->dirbuf[XDIR_ModTime10] = 0;
4191 st_dword(fs->dirbuf + XDIR_AccTime, 0);
4192 res = store_xdir(&dj); /* Restore it to the directory */
4193 if (res == FR_OK) {
4194 res = sync_fs(fs);
4195 fp->flag &= (BYTE)~FA_MODIFIED;
4196 }
4197 }
4198 FREE_NAMBUF();
4199 }
4200 } else
4201 #endif
4202 {
4203 res = move_window(fs, fp->dir_sect);
4204 if (res == FR_OK) {
4205 dir = fp->dir_ptr;
4206 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4207 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */
4208 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */
4209 st_dword(dir + DIR_ModTime, tm); /* Update modified time */
4210 st_word(dir + DIR_LstAccDate, 0);
4211 fs->wflag = 1;
4212 res = sync_fs(fs); /* Restore it to the directory */
4213 fp->flag &= (BYTE)~FA_MODIFIED;
4214 }
4215 }
4216 }
4217 }
4218
4219 LEAVE_FF(fs, res);
4220 }
4221
4222 #endif /* !FF_FS_READONLY */
4223
4224
4225
4226
4227 /*-----------------------------------------------------------------------*/
4228 /* Close File */
4229 /*-----------------------------------------------------------------------*/
4230
4231 FRESULT f_close (
4232 FIL* fp /* Open file to be closed */
4233 )
4234 {
4235 FRESULT res;
4236 FATFS *fs;
4237
4238 #if !FF_FS_READONLY
4239 res = f_sync(fp); /* Flush cached data */
4240 if (res == FR_OK)
4241 #endif
4242 {
4243 res = validate(&fp->obj, &fs); /* Lock volume */
4244 if (res == FR_OK) {
4245 #if FF_FS_LOCK
4246 res = dec_share(fp->obj.lockid); /* Decrement file open counter */
4247 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */
4248 #else
4249 fp->obj.fs = 0; /* Invalidate file object */
4250 #endif
4251 #if FF_FS_REENTRANT
4252 unlock_volume(fs, FR_OK); /* Unlock volume */
4253 #endif
4254 }
4255 }
4256 return res;
4257 }
4258
4259
4260
4261
4262 #if FF_FS_RPATH >= 1
4263 /*-----------------------------------------------------------------------*/
4264 /* Change Current Directory or Current Drive, Get Current Directory */
4265 /*-----------------------------------------------------------------------*/
4266
4267 FRESULT f_chdrive (
4268 const TCHAR* path /* Drive number to set */
4269 )
4270 {
4271 int vol;
4272
4273
4274 /* Get logical drive number */
4275 vol = get_ldnumber(&path);
4276 if (vol < 0) return FR_INVALID_DRIVE;
4277 CurrVol = (BYTE)vol; /* Set it as current volume */
4278
4279 return FR_OK;
4280 }
4281
4282
4283
4284 FRESULT f_chdir (
4285 const TCHAR* path /* Pointer to the directory path */
4286 )
4287 {
4288 #if FF_STR_VOLUME_ID == 2
4289 UINT i;
4290 #endif
4291 FRESULT res;
4292 DIR dj;
4293 FATFS *fs;
4294 DEF_NAMBUF
4295
4296
4297 /* Get logical drive */
4298 res = mount_volume(&path, &fs, 0);
4299 if (res == FR_OK) {
4300 dj.obj.fs = fs;
4301 INIT_NAMBUF(fs);
4302 res = follow_path(&dj, path); /* Follow the path */
4303 if (res == FR_OK) { /* Follow completed */
4304 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it the start directory itself? */
4305 fs->cdir = dj.obj.sclust;
4306 #if FF_FS_EXFAT
4307 if (fs->fs_type == FS_EXFAT) {
4308 fs->cdc_scl = dj.obj.c_scl;
4309 fs->cdc_size = dj.obj.c_size;
4310 fs->cdc_ofs = dj.obj.c_ofs;
4311 }
4312 #endif
4313 } else {
4314 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */
4315 #if FF_FS_EXFAT
4316 if (fs->fs_type == FS_EXFAT) {
4317 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */
4318 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */
4319 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
4320 fs->cdc_ofs = dj.blk_ofs;
4321 } else
4322 #endif
4323 {
4324 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */
4325 }
4326 } else {
4327 res = FR_NO_PATH; /* Reached but a file */
4328 }
4329 }
4330 }
4331 FREE_NAMBUF();
4332 if (res == FR_NO_FILE) res = FR_NO_PATH;
4333 #if FF_STR_VOLUME_ID == 2 /* Also current drive is changed if in Unix style volume ID */
4334 if (res == FR_OK) {
4335 for (i = FF_VOLUMES - 1; i && fs != FatFs[i]; i--) ; /* Set current drive */
4336 CurrVol = (BYTE)i;
4337 }
4338 #endif
4339 }
4340
4341 LEAVE_FF(fs, res);
4342 }
4343
4344
4345 #if FF_FS_RPATH >= 2
4346 FRESULT f_getcwd (
4347 TCHAR* buff, /* Pointer to the directory path */
4348 UINT len /* Size of buff in unit of TCHAR */
4349 )
4350 {
4351 FRESULT res;
4352 DIR dj;
4353 FATFS *fs;
4354 UINT i, n;
4355 DWORD ccl;
4356 TCHAR *tp = buff;
4357 #if FF_VOLUMES >= 2
4358 UINT vl;
4359 #if FF_STR_VOLUME_ID
4360 const char *vp;
4361 #endif
4362 #endif
4363 FILINFO fno;
4364 DEF_NAMBUF
4365
4366
4367 /* Get logical drive */
4368 buff[0] = 0; /* Set null string to get current volume */
4369 res = mount_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */
4370 if (res == FR_OK) {
4371 dj.obj.fs = fs;
4372 INIT_NAMBUF(fs);
4373
4374 /* Follow parent directories and create the path */
4375 i = len; /* Bottom of buffer (directory stack base) */
4376 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */
4377 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */
4378 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
4379 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */
4380 if (res != FR_OK) break;
4381 res = move_window(fs, dj.sect);
4382 if (res != FR_OK) break;
4383 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */
4384 res = dir_sdi(&dj, 0);
4385 if (res != FR_OK) break;
4386 do { /* Find the entry links to the child directory */
4387 res = DIR_READ_FILE(&dj);
4388 if (res != FR_OK) break;
4389 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */
4390 res = dir_next(&dj, 0);
4391 } while (res == FR_OK);
4392 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
4393 if (res != FR_OK) break;
4394 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
4395 for (n = 0; fno.fname[n]; n++) ; /* Name length */
4396 if (i < n + 1) { /* Insufficient space to store the path name? */
4397 res = FR_NOT_ENOUGH_CORE; break;
4398 }
4399 while (n) buff[--i] = fno.fname[--n]; /* Stack the name */
4400 buff[--i] = '/';
4401 }
4402 }
4403 if (res == FR_OK) {
4404 if (i == len) buff[--i] = '/'; /* Is it the root-directory? */
4405 #if FF_VOLUMES >= 2 /* Put drive prefix */
4406 vl = 0;
4407 #if FF_STR_VOLUME_ID >= 1 /* String volume ID */
4408 for (n = 0, vp = (const char*)VolumeStr[CurrVol]; vp[n]; n++) ;
4409 if (i >= n + 2) {
4410 if (FF_STR_VOLUME_ID == 2) *tp++ = (TCHAR)'/';
4411 for (vl = 0; vl < n; *tp++ = (TCHAR)vp[vl], vl++) ;
4412 if (FF_STR_VOLUME_ID == 1) *tp++ = (TCHAR)':';
4413 vl++;
4414 }
4415 #else /* Numeric volume ID */
4416 if (i >= 3) {
4417 *tp++ = (TCHAR)'0' + CurrVol;
4418 *tp++ = (TCHAR)':';
4419 vl = 2;
4420 }
4421 #endif
4422 if (vl == 0) res = FR_NOT_ENOUGH_CORE;
4423 #endif
4424 /* Add current directory path */
4425 if (res == FR_OK) {
4426 do { /* Copy stacked path string */
4427 *tp++ = buff[i++];
4428 } while (i < len);
4429 }
4430 }
4431 FREE_NAMBUF();
4432 }
4433
4434 *tp = 0;
4435 LEAVE_FF(fs, res);
4436 }
4437
4438 #endif /* FF_FS_RPATH >= 2 */
4439 #endif /* FF_FS_RPATH >= 1 */
4440
4441
4442
4443 #if FF_FS_MINIMIZE <= 2
4444 /*-----------------------------------------------------------------------*/
4445 /* Seek File Read/Write Pointer */
4446 /*-----------------------------------------------------------------------*/
4447
4448 FRESULT f_lseek (
4449 FIL* fp, /* Pointer to the file object */
4450 FSIZE_t ofs /* File pointer from top of file */
4451 )
4452 {
4453 FRESULT res;
4454 FATFS *fs;
4455 DWORD clst, bcs;
4456 LBA_t nsect;
4457 FSIZE_t ifptr;
4458 #if FF_USE_FASTSEEK
4459 DWORD cl, pcl, ncl, tcl, tlen, ulen;
4460 DWORD *tbl;
4461 LBA_t dsc;
4462 #endif
4463
4464 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4465 if (res == FR_OK) res = (FRESULT)fp->err;
4466 #if FF_FS_EXFAT && !FF_FS_READONLY
4467 if (res == FR_OK && fs->fs_type == FS_EXFAT) {
4468 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4469 }
4470 #endif
4471 if (res != FR_OK) LEAVE_FF(fs, res);
4472
4473 #if FF_USE_FASTSEEK
4474 if (fp->cltbl) { /* Fast seek */
4475 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
4476 tbl = fp->cltbl;
4477 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
4478 cl = fp->obj.sclust; /* Origin of the chain */
4479 if (cl != 0) {
4480 do {
4481 /* Get a fragment */
4482 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
4483 do {
4484 pcl = cl; ncl++;
4485 cl = get_fat(&fp->obj, cl);
4486 if (cl <= 1) ABORT(fs, FR_INT_ERR);
4487 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4488 } while (cl == pcl + 1);
4489 if (ulen <= tlen) { /* Store the length and top of the fragment */
4490 *tbl++ = ncl; *tbl++ = tcl;
4491 }
4492 } while (cl < fs->n_fatent); /* Repeat until end of chain */
4493 }
4494 *fp->cltbl = ulen; /* Number of items used */
4495 if (ulen <= tlen) {
4496 *tbl = 0; /* Terminate table */
4497 } else {
4498 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
4499 }
4500 } else { /* Fast seek */
4501 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */
4502 fp->fptr = ofs; /* Set file pointer */
4503 if (ofs > 0) {
4504 fp->clust = clmt_clust(fp, ofs - 1);
4505 dsc = clst2sect(fs, fp->clust);
4506 if (dsc == 0) ABORT(fs, FR_INT_ERR);
4507 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
4508 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */
4509 #if !FF_FS_TINY
4510 #if !FF_FS_READONLY
4511 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4512 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4513 fp->flag &= (BYTE)~FA_DIRTY;
4514 }
4515 #endif
4516 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */
4517 #endif
4518 fp->sect = dsc;
4519 }
4520 }
4521 }
4522 } else
4523 #endif
4524
4525 /* Normal Seek */
4526 {
4527 #if FF_FS_EXFAT
4528 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */
4529 #endif
4530 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */
4531 ofs = fp->obj.objsize;
4532 }
4533 ifptr = fp->fptr;
4534 fp->fptr = nsect = 0;
4535 if (ofs > 0) {
4536 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */
4537 if (ifptr > 0 &&
4538 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
4539 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */
4540 ofs -= fp->fptr;
4541 clst = fp->clust;
4542 } else { /* When seek to back cluster, */
4543 clst = fp->obj.sclust; /* start from the first cluster */
4544 #if !FF_FS_READONLY
4545 if (clst == 0) { /* If no cluster chain, create a new chain */
4546 clst = create_chain(&fp->obj, 0);
4547 if (clst == 1) ABORT(fs, FR_INT_ERR);
4548 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4549 fp->obj.sclust = clst;
4550 }
4551 #endif
4552 fp->clust = clst;
4553 }
4554 if (clst != 0) {
4555 while (ofs > bcs) { /* Cluster following loop */
4556 ofs -= bcs; fp->fptr += bcs;
4557 #if !FF_FS_READONLY
4558 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
4559 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */
4560 fp->obj.objsize = fp->fptr;
4561 fp->flag |= FA_MODIFIED;
4562 }
4563 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */
4564 if (clst == 0) { /* Clip file size in case of disk full */
4565 ofs = 0; break;
4566 }
4567 } else
4568 #endif
4569 {
4570 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */
4571 }
4572 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4573 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
4574 fp->clust = clst;
4575 }
4576 fp->fptr += ofs;
4577 if (ofs % SS(fs)) {
4578 nsect = clst2sect(fs, clst); /* Current sector */
4579 if (nsect == 0) ABORT(fs, FR_INT_ERR);
4580 nsect += (DWORD)(ofs / SS(fs));
4581 }
4582 }
4583 }
4584 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */
4585 fp->obj.objsize = fp->fptr;
4586 fp->flag |= FA_MODIFIED;
4587 }
4588 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */
4589 #if !FF_FS_TINY
4590 #if !FF_FS_READONLY
4591 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4592 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4593 fp->flag &= (BYTE)~FA_DIRTY;
4594 }
4595 #endif
4596 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
4597 #endif
4598 fp->sect = nsect;
4599 }
4600 }
4601
4602 LEAVE_FF(fs, res);
4603 }
4604
4605
4606
4607 #if FF_FS_MINIMIZE <= 1
4608 /*-----------------------------------------------------------------------*/
4609 /* Create a Directory Object */
4610 /*-----------------------------------------------------------------------*/
4611
4612 FRESULT f_opendir (
4613 DIR* dp, /* Pointer to directory object to create */
4614 const TCHAR* path /* Pointer to the directory path */
4615 )
4616 {
4617 FRESULT res;
4618 FATFS *fs;
4619 DEF_NAMBUF
4620
4621
4622 if (!dp) return FR_INVALID_OBJECT;
4623
4624 /* Get logical drive */
4625 res = mount_volume(&path, &fs, 0);
4626 if (res == FR_OK) {
4627 dp->obj.fs = fs;
4628 INIT_NAMBUF(fs);
4629 res = follow_path(dp, path); /* Follow the path to the directory */
4630 if (res == FR_OK) { /* Follow completed */
4631 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */
4632 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */
4633 #if FF_FS_EXFAT
4634 if (fs->fs_type == FS_EXFAT) {
4635 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory information */
4636 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
4637 dp->obj.c_ofs = dp->blk_ofs;
4638 init_alloc_info(fs, &dp->obj); /* Get object allocation info */
4639 } else
4640 #endif
4641 {
4642 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */
4643 }
4644 } else { /* This object is a file */
4645 res = FR_NO_PATH;
4646 }
4647 }
4648 if (res == FR_OK) {
4649 dp->obj.id = fs->id;
4650 res = dir_sdi(dp, 0); /* Rewind directory */
4651 #if FF_FS_LOCK
4652 if (res == FR_OK) {
4653 if (dp->obj.sclust != 0) {
4654 dp->obj.lockid = inc_share(dp, 0); /* Lock the sub directory */
4655 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES;
4656 } else {
4657 dp->obj.lockid = 0; /* Root directory need not to be locked */
4658 }
4659 }
4660 #endif
4661 }
4662 }
4663 FREE_NAMBUF();
4664 if (res == FR_NO_FILE) res = FR_NO_PATH;
4665 }
4666 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function failed */
4667
4668 LEAVE_FF(fs, res);
4669 }
4670
4671
4672
4673
4674 /*-----------------------------------------------------------------------*/
4675 /* Close Directory */
4676 /*-----------------------------------------------------------------------*/
4677
4678 FRESULT f_closedir (
4679 DIR *dp /* Pointer to the directory object to be closed */
4680 )
4681 {
4682 FRESULT res;
4683 FATFS *fs;
4684
4685
4686 res = validate(&dp->obj, &fs); /* Check validity of the file object */
4687 if (res == FR_OK) {
4688 #if FF_FS_LOCK
4689 if (dp->obj.lockid) res = dec_share(dp->obj.lockid); /* Decrement sub-directory open counter */
4690 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */
4691 #else
4692 dp->obj.fs = 0; /* Invalidate directory object */
4693 #endif
4694 #if FF_FS_REENTRANT
4695 unlock_volume(fs, FR_OK); /* Unlock volume */
4696 #endif
4697 }
4698 return res;
4699 }
4700
4701
4702
4703
4704 /*-----------------------------------------------------------------------*/
4705 /* Read Directory Entries in Sequence */
4706 /*-----------------------------------------------------------------------*/
4707
4708 FRESULT f_readdir (
4709 DIR* dp, /* Pointer to the open directory object */
4710 FILINFO* fno /* Pointer to file information to return */
4711 )
4712 {
4713 FRESULT res;
4714 FATFS *fs;
4715 DEF_NAMBUF
4716
4717
4718 res = validate(&dp->obj, &fs); /* Check validity of the directory object */
4719 if (res == FR_OK) {
4720 if (!fno) {
4721 res = dir_sdi(dp, 0); /* Rewind the directory object */
4722 } else {
4723 INIT_NAMBUF(fs);
4724 res = DIR_READ_FILE(dp); /* Read an item */
4725 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */
4726 if (res == FR_OK) { /* A valid entry is found */
4727 get_fileinfo(dp, fno); /* Get the object information */
4728 res = dir_next(dp, 0); /* Increment index for next */
4729 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */
4730 }
4731 FREE_NAMBUF();
4732 }
4733 }
4734 LEAVE_FF(fs, res);
4735 }
4736
4737
4738
4739 #if FF_USE_FIND
4740 /*-----------------------------------------------------------------------*/
4741 /* Find Next File */
4742 /*-----------------------------------------------------------------------*/
4743
4744 FRESULT f_findnext (
4745 DIR* dp, /* Pointer to the open directory object */
4746 FILINFO* fno /* Pointer to the file information structure */
4747 )
4748 {
4749 FRESULT res;
4750
4751
4752 for (;;) {
4753 res = f_readdir(dp, fno); /* Get a directory item */
4754 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
4755 if (pattern_match(dp->pat, fno->fname, 0, FIND_RECURS)) break; /* Test for the file name */
4756 #if FF_USE_LFN && FF_USE_FIND == 2
4757 if (pattern_match(dp->pat, fno->altname, 0, FIND_RECURS)) break; /* Test for alternative name if exist */
4758 #endif
4759 }
4760 return res;
4761 }
4762
4763
4764
4765 /*-----------------------------------------------------------------------*/
4766 /* Find First File */
4767 /*-----------------------------------------------------------------------*/
4768
4769 FRESULT f_findfirst (
4770 DIR* dp, /* Pointer to the blank directory object */
4771 FILINFO* fno, /* Pointer to the file information structure */
4772 const TCHAR* path, /* Pointer to the directory to open */
4773 const TCHAR* pattern /* Pointer to the matching pattern */
4774 )
4775 {
4776 FRESULT res;
4777
4778
4779 dp->pat = pattern; /* Save pointer to pattern string */
4780 res = f_opendir(dp, path); /* Open the target directory */
4781 if (res == FR_OK) {
4782 res = f_findnext(dp, fno); /* Find the first item */
4783 }
4784 return res;
4785 }
4786
4787 #endif /* FF_USE_FIND */
4788
4789
4790
4791 #if FF_FS_MINIMIZE == 0
4792 /*-----------------------------------------------------------------------*/
4793 /* Get File Status */
4794 /*-----------------------------------------------------------------------*/
4795
4796 FRESULT f_stat (
4797 const TCHAR* path, /* Pointer to the file path */
4798 FILINFO* fno /* Pointer to file information to return */
4799 )
4800 {
4801 FRESULT res;
4802 DIR dj;
4803 DEF_NAMBUF
4804
4805
4806 /* Get logical drive */
4807 res = mount_volume(&path, &dj.obj.fs, 0);
4808 if (res == FR_OK) {
4809 INIT_NAMBUF(dj.obj.fs);
4810 res = follow_path(&dj, path); /* Follow the file path */
4811 if (res == FR_OK) { /* Follow completed */
4812 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */
4813 res = FR_INVALID_NAME;
4814 } else { /* Found an object */
4815 if (fno) get_fileinfo(&dj, fno);
4816 }
4817 }
4818 FREE_NAMBUF();
4819 }
4820
4821 LEAVE_FF(dj.obj.fs, res);
4822 }
4823
4824
4825
4826 #if !FF_FS_READONLY
4827 /*-----------------------------------------------------------------------*/
4828 /* Get Number of Free Clusters */
4829 /*-----------------------------------------------------------------------*/
4830
4831 FRESULT f_getfree (
4832 const TCHAR* path, /* Logical drive number */
4833 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
4834 FATFS** fatfs /* Pointer to a pointer to return corresponding filesystem object */
4835 )
4836 {
4837 FRESULT res;
4838 FATFS *fs;
4839 DWORD nfree, clst, stat;
4840 LBA_t sect;
4841 UINT i;
4842 FFOBJID obj;
4843
4844
4845 /* Get logical drive */
4846 res = mount_volume(&path, &fs, 0);
4847 if (res == FR_OK) {
4848 *fatfs = fs; /* Return ptr to the fs object */
4849 /* If free_clst is valid, return it without full FAT scan */
4850 if (fs->free_clst <= fs->n_fatent - 2) {
4851 *nclst = fs->free_clst;
4852 } else {
4853 /* Scan FAT to obtain the correct free cluster count */
4854 nfree = 0;
4855 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */
4856 clst = 2; obj.fs = fs;
4857 do {
4858 stat = get_fat(&obj, clst);
4859 if (stat == 0xFFFFFFFF) {
4860 res = FR_DISK_ERR; break;
4861 }
4862 if (stat == 1) {
4863 res = FR_INT_ERR; break;
4864 }
4865 if (stat == 0) nfree++;
4866 } while (++clst < fs->n_fatent);
4867 } else {
4868 #if FF_FS_EXFAT
4869 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */
4870 BYTE bm;
4871 UINT b;
4872
4873 clst = fs->n_fatent - 2; /* Number of clusters */
4874 sect = fs->bitbase; /* Bitmap sector */
4875 i = 0; /* Offset in the sector */
4876 do { /* Counts numbuer of clear bits (free clusters) in the bitmap */
4877 if (i == 0) { /* New sector? */
4878 res = move_window(fs, sect++);
4879 if (res != FR_OK) break;
4880 }
4881 for (b = 8, bm = ~fs->win[i]; b && clst; b--, clst--) { /* Count clear bits in a byte */
4882 nfree += bm & 1;
4883 bm >>= 1;
4884 }
4885 i = (i + 1) % SS(fs); /* Next byte */
4886 } while (clst);
4887 } else
4888 #endif
4889 { /* FAT16/32: Scan WORD/DWORD FAT entries */
4890 clst = fs->n_fatent; /* Number of entries */
4891 sect = fs->fatbase; /* Top of the FAT */
4892 i = 0; /* Offset in the sector */
4893 do { /* Counts numbuer of entries with zero in the FAT */
4894 if (i == 0) { /* New sector? */
4895 res = move_window(fs, sect++);
4896 if (res != FR_OK) break;
4897 }
4898 if (fs->fs_type == FS_FAT16) {
4899 if (ld_word(fs->win + i) == 0) nfree++; /* FAT16: Is this cluster free? */
4900 i += 2; /* Next entry */
4901 } else {
4902 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++; /* FAT32: Is this cluster free? */
4903 i += 4; /* Next entry */
4904 }
4905 i %= SS(fs);
4906 } while (--clst);
4907 }
4908 }
4909 if (res == FR_OK) { /* Update parameters if succeeded */
4910 *nclst = nfree; /* Return the free clusters */
4911 fs->free_clst = nfree; /* Now free cluster count is valid */
4912 fs->fsi_flag |= 1; /* FAT32/exfAT : Allocation information is to be updated */
4913 }
4914 }
4915 }
4916
4917 LEAVE_FF(fs, res);
4918 }
4919
4920
4921
4922
4923 /*-----------------------------------------------------------------------*/
4924 /* Truncate File */
4925 /*-----------------------------------------------------------------------*/
4926
4927 FRESULT f_truncate (
4928 FIL* fp /* Pointer to the file object */
4929 )
4930 {
4931 FRESULT res;
4932 FATFS *fs;
4933 DWORD ncl;
4934
4935
4936 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4937 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
4938 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4939
4940 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */
4941 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
4942 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
4943 fp->obj.sclust = 0;
4944 } else { /* When truncate a part of the file, remove remaining clusters */
4945 ncl = get_fat(&fp->obj, fp->clust);
4946 res = FR_OK;
4947 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
4948 if (ncl == 1) res = FR_INT_ERR;
4949 if (res == FR_OK && ncl < fs->n_fatent) {
4950 res = remove_chain(&fp->obj, ncl, fp->clust);
4951 }
4952 }
4953 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */
4954 fp->flag |= FA_MODIFIED;
4955 #if !FF_FS_TINY
4956 if (res == FR_OK && (fp->flag & FA_DIRTY)) {
4957 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) {
4958 res = FR_DISK_ERR;
4959 } else {
4960 fp->flag &= (BYTE)~FA_DIRTY;
4961 }
4962 }
4963 #endif
4964 if (res != FR_OK) ABORT(fs, res);
4965 }
4966
4967 LEAVE_FF(fs, res);
4968 }
4969
4970
4971
4972
4973 /*-----------------------------------------------------------------------*/
4974 /* Delete a File/Directory */
4975 /*-----------------------------------------------------------------------*/
4976
4977 FRESULT f_unlink (
4978 const TCHAR* path /* Pointer to the file or directory path */
4979 )
4980 {
4981 FRESULT res;
4982 FATFS *fs;
4983 DIR dj, sdj;
4984 DWORD dclst = 0;
4985 #if FF_FS_EXFAT
4986 FFOBJID obj;
4987 #endif
4988 DEF_NAMBUF
4989
4990
4991 /* Get logical drive */
4992 res = mount_volume(&path, &fs, FA_WRITE);
4993 if (res == FR_OK) {
4994 dj.obj.fs = fs;
4995 INIT_NAMBUF(fs);
4996 res = follow_path(&dj, path); /* Follow the file path */
4997 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {
4998 res = FR_INVALID_NAME; /* Cannot remove dot entry */
4999 }
5000 #if FF_FS_LOCK
5001 if (res == FR_OK) res = chk_share(&dj, 2); /* Check if it is an open object */
5002 #endif
5003 if (res == FR_OK) { /* The object is accessible */
5004 if (dj.fn[NSFLAG] & NS_NONAME) {
5005 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
5006 } else {
5007 if (dj.obj.attr & AM_RDO) {
5008 res = FR_DENIED; /* Cannot remove R/O object */
5009 }
5010 }
5011 if (res == FR_OK) {
5012 #if FF_FS_EXFAT
5013 obj.fs = fs;
5014 if (fs->fs_type == FS_EXFAT) {
5015 init_alloc_info(fs, &obj);
5016 dclst = obj.sclust;
5017 } else
5018 #endif
5019 {
5020 dclst = ld_clust(fs, dj.dir);
5021 }
5022 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */
5023 #if FF_FS_RPATH != 0
5024 if (dclst == fs->cdir) { /* Is it the current directory? */
5025 res = FR_DENIED;
5026 } else
5027 #endif
5028 {
5029 sdj.obj.fs = fs; /* Open the sub-directory */
5030 sdj.obj.sclust = dclst;
5031 #if FF_FS_EXFAT
5032 if (fs->fs_type == FS_EXFAT) {
5033 sdj.obj.objsize = obj.objsize;
5034 sdj.obj.stat = obj.stat;
5035 }
5036 #endif
5037 res = dir_sdi(&sdj, 0);
5038 if (res == FR_OK) {
5039 res = DIR_READ_FILE(&sdj); /* Test if the directory is empty */
5040 if (res == FR_OK) res = FR_DENIED; /* Not empty? */
5041 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */
5042 }
5043 }
5044 }
5045 }
5046 if (res == FR_OK) {
5047 res = dir_remove(&dj); /* Remove the directory entry */
5048 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */
5049 #if FF_FS_EXFAT
5050 res = remove_chain(&obj, dclst, 0);
5051 #else
5052 res = remove_chain(&dj.obj, dclst, 0);
5053 #endif
5054 }
5055 if (res == FR_OK) res = sync_fs(fs);
5056 }
5057 }
5058 FREE_NAMBUF();
5059 }
5060
5061 LEAVE_FF(fs, res);
5062 }
5063
5064
5065
5066
5067 /*-----------------------------------------------------------------------*/
5068 /* Create a Directory */
5069 /*-----------------------------------------------------------------------*/
5070
5071 FRESULT f_mkdir (
5072 const TCHAR* path /* Pointer to the directory path */
5073 )
5074 {
5075 FRESULT res;
5076 FATFS *fs;
5077 DIR dj;
5078 FFOBJID sobj;
5079 DWORD dcl, pcl, tm;
5080 DEF_NAMBUF
5081
5082
5083 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5084 if (res == FR_OK) {
5085 dj.obj.fs = fs;
5086 INIT_NAMBUF(fs);
5087 res = follow_path(&dj, path); /* Follow the file path */
5088 if (res == FR_OK) res = FR_EXIST; /* Name collision? */
5089 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { /* Invalid name? */
5090 res = FR_INVALID_NAME;
5091 }
5092 if (res == FR_NO_FILE) { /* It is clear to create a new directory */
5093 sobj.fs = fs; /* New object id to create a new chain */
5094 dcl = create_chain(&sobj, 0); /* Allocate a cluster for the new directory */
5095 res = FR_OK;
5096 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster? */
5097 if (dcl == 1) res = FR_INT_ERR; /* Any insanity? */
5098 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; /* Disk error? */
5099 tm = GET_FATTIME();
5100 if (res == FR_OK) {
5101 res = dir_clear(fs, dcl); /* Clean up the new table */
5102 if (res == FR_OK) {
5103 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* Create dot entries (FAT only) */
5104 memset(fs->win + DIR_Name, ' ', 11); /* Create "." entry */
5105 fs->win[DIR_Name] = '.';
5106 fs->win[DIR_Attr] = AM_DIR;
5107 st_dword(fs->win + DIR_ModTime, tm);
5108 st_clust(fs, fs->win, dcl);
5109 memcpy(fs->win + SZDIRE, fs->win, SZDIRE); /* Create ".." entry */
5110 fs->win[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
5111 st_clust(fs, fs->win + SZDIRE, pcl);
5112 fs->wflag = 1;
5113 }
5114 res = dir_register(&dj); /* Register the object to the parent directory */
5115 }
5116 }
5117 if (res == FR_OK) {
5118 #if FF_FS_EXFAT
5119 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */
5120 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */
5121 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */
5122 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)fs->csize * SS(fs)); /* Directory size needs to be valid */
5123 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)fs->csize * SS(fs));
5124 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */
5125 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */
5126 res = store_xdir(&dj);
5127 } else
5128 #endif
5129 {
5130 st_dword(dj.dir + DIR_ModTime, tm); /* Created time */
5131 st_clust(fs, dj.dir, dcl); /* Table start cluster */
5132 dj.dir[DIR_Attr] = AM_DIR; /* Attribute */
5133 fs->wflag = 1;
5134 }
5135 if (res == FR_OK) {
5136 res = sync_fs(fs);
5137 }
5138 } else {
5139 remove_chain(&sobj, dcl, 0); /* Could not register, remove the allocated cluster */
5140 }
5141 }
5142 FREE_NAMBUF();
5143 }
5144
5145 LEAVE_FF(fs, res);
5146 }
5147
5148
5149
5150
5151 /*-----------------------------------------------------------------------*/
5152 /* Rename a File/Directory */
5153 /*-----------------------------------------------------------------------*/
5154
5155 FRESULT f_rename (
5156 const TCHAR* path_old, /* Pointer to the object name to be renamed */
5157 const TCHAR* path_new /* Pointer to the new name */
5158 )
5159 {
5160 FRESULT res;
5161 FATFS *fs;
5162 DIR djo, djn;
5163 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir;
5164 LBA_t sect;
5165 DEF_NAMBUF
5166
5167
5168 get_ldnumber(&path_new); /* Snip the drive number of new name off */
5169 res = mount_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */
5170 if (res == FR_OK) {
5171 djo.obj.fs = fs;
5172 INIT_NAMBUF(fs);
5173 res = follow_path(&djo, path_old); /* Check old object */
5174 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */
5175 #if FF_FS_LOCK
5176 if (res == FR_OK) {
5177 res = chk_share(&djo, 2);
5178 }
5179 #endif
5180 if (res == FR_OK) { /* Object to be renamed is found */
5181 #if FF_FS_EXFAT
5182 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */
5183 BYTE nf, nn;
5184 WORD nh;
5185
5186 memcpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */
5187 memcpy(&djn, &djo, sizeof djo);
5188 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5189 if (res == FR_OK) { /* Is new name already in use by any other object? */
5190 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5191 }
5192 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5193 res = dir_register(&djn); /* Register the new entry */
5194 if (res == FR_OK) {
5195 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
5196 nh = ld_word(fs->dirbuf + XDIR_NameHash);
5197 memcpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */
5198 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
5199 st_word(fs->dirbuf + XDIR_NameHash, nh);
5200 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5201 /* Start of critical section where an interruption can cause a cross-link */
5202 res = store_xdir(&djn);
5203 }
5204 }
5205 } else
5206 #endif
5207 { /* At FAT/FAT32 volume */
5208 memcpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */
5209 memcpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
5210 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5211 if (res == FR_OK) { /* Is new name already in use by any other object? */
5212 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5213 }
5214 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5215 res = dir_register(&djn); /* Register the new entry */
5216 if (res == FR_OK) {
5217 dir = djn.dir; /* Copy directory entry of the object except name */
5218 memcpy(dir + 13, buf + 13, SZDIRE - 13);
5219 dir[DIR_Attr] = buf[DIR_Attr];
5220 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5221 fs->wflag = 1;
5222 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */
5223 sect = clst2sect(fs, ld_clust(fs, dir));
5224 if (sect == 0) {
5225 res = FR_INT_ERR;
5226 } else {
5227 /* Start of critical section where an interruption can cause a cross-link */
5228 res = move_window(fs, sect);
5229 dir = fs->win + SZDIRE * 1; /* Pointer to .. entry */
5230 if (res == FR_OK && dir[1] == '.') {
5231 st_clust(fs, dir, djn.obj.sclust);
5232 fs->wflag = 1;
5233 }
5234 }
5235 }
5236 }
5237 }
5238 }
5239 if (res == FR_OK) {
5240 res = dir_remove(&djo); /* Remove old entry */
5241 if (res == FR_OK) {
5242 res = sync_fs(fs);
5243 }
5244 }
5245 /* End of the critical section */
5246 }
5247 FREE_NAMBUF();
5248 }
5249
5250 LEAVE_FF(fs, res);
5251 }
5252
5253 #endif /* !FF_FS_READONLY */
5254 #endif /* FF_FS_MINIMIZE == 0 */
5255 #endif /* FF_FS_MINIMIZE <= 1 */
5256 #endif /* FF_FS_MINIMIZE <= 2 */
5257
5258
5259
5260 #if FF_USE_CHMOD && !FF_FS_READONLY
5261 /*-----------------------------------------------------------------------*/
5262 /* Change Attribute */
5263 /*-----------------------------------------------------------------------*/
5264
5265 FRESULT f_chmod (
5266 const TCHAR* path, /* Pointer to the file path */
5267 BYTE attr, /* Attribute bits */
5268 BYTE mask /* Attribute mask to change */
5269 )
5270 {
5271 FRESULT res;
5272 FATFS *fs;
5273 DIR dj;
5274 DEF_NAMBUF
5275
5276
5277 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5278 if (res == FR_OK) {
5279 dj.obj.fs = fs;
5280 INIT_NAMBUF(fs);
5281 res = follow_path(&dj, path); /* Follow the file path */
5282 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5283 if (res == FR_OK) {
5284 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
5285 #if FF_FS_EXFAT
5286 if (fs->fs_type == FS_EXFAT) {
5287 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5288 res = store_xdir(&dj);
5289 } else
5290 #endif
5291 {
5292 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5293 fs->wflag = 1;
5294 }
5295 if (res == FR_OK) {
5296 res = sync_fs(fs);
5297 }
5298 }
5299 FREE_NAMBUF();
5300 }
5301
5302 LEAVE_FF(fs, res);
5303 }
5304
5305
5306
5307
5308 /*-----------------------------------------------------------------------*/
5309 /* Change Timestamp */
5310 /*-----------------------------------------------------------------------*/
5311
5312 FRESULT f_utime (
5313 const TCHAR* path, /* Pointer to the file/directory name */
5314 const FILINFO* fno /* Pointer to the timestamp to be set */
5315 )
5316 {
5317 FRESULT res;
5318 FATFS *fs;
5319 DIR dj;
5320 DEF_NAMBUF
5321
5322
5323 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5324 if (res == FR_OK) {
5325 dj.obj.fs = fs;
5326 INIT_NAMBUF(fs);
5327 res = follow_path(&dj, path); /* Follow the file path */
5328 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5329 if (res == FR_OK) {
5330 #if FF_FS_EXFAT
5331 if (fs->fs_type == FS_EXFAT) {
5332 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5333 res = store_xdir(&dj);
5334 } else
5335 #endif
5336 {
5337 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5338 fs->wflag = 1;
5339 }
5340 if (res == FR_OK) {
5341 res = sync_fs(fs);
5342 }
5343 }
5344 FREE_NAMBUF();
5345 }
5346
5347 LEAVE_FF(fs, res);
5348 }
5349
5350 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */
5351
5352
5353
5354 #if FF_USE_LABEL
5355 /*-----------------------------------------------------------------------*/
5356 /* Get Volume Label */
5357 /*-----------------------------------------------------------------------*/
5358
5359 FRESULT f_getlabel (
5360 const TCHAR* path, /* Logical drive number */
5361 TCHAR* label, /* Buffer to store the volume label */
5362 DWORD* vsn /* Variable to store the volume serial number */
5363 )
5364 {
5365 FRESULT res;
5366 FATFS *fs;
5367 DIR dj;
5368 UINT si, di;
5369 WCHAR wc;
5370
5371 /* Get logical drive */
5372 res = mount_volume(&path, &fs, 0);
5373
5374 /* Get volume label */
5375 if (res == FR_OK && label) {
5376 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5377 res = dir_sdi(&dj, 0);
5378 if (res == FR_OK) {
5379 res = DIR_READ_LABEL(&dj); /* Find a volume label entry */
5380 if (res == FR_OK) {
5381 #if FF_FS_EXFAT
5382 if (fs->fs_type == FS_EXFAT) {
5383 WCHAR hs;
5384 UINT nw;
5385
5386 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */
5387 wc = ld_word(dj.dir + XDIR_Label + si * 2);
5388 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */
5389 hs = wc; continue;
5390 }
5391 nw = put_utf((DWORD)hs << 16 | wc, &label[di], 4); /* Store it in API encoding */
5392 if (nw == 0) { /* Encode error? */
5393 di = 0; break;
5394 }
5395 di += nw;
5396 hs = 0;
5397 }
5398 if (hs != 0) di = 0; /* Broken surrogate pair? */
5399 label[di] = 0;
5400 } else
5401 #endif
5402 {
5403 si = di = 0; /* Extract volume label from AM_VOL entry */
5404 while (si < 11) {
5405 wc = dj.dir[si++];
5406 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */
5407 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */
5408 wc = ff_oem2uni(wc, CODEPAGE); /* Convert it into Unicode */
5409 if (wc == 0) { /* Invalid char in current code page? */
5410 di = 0; break;
5411 }
5412 di += put_utf(wc, &label[di], 4); /* Store it in Unicode */
5413 #else /* ANSI/OEM output */
5414 label[di++] = (TCHAR)wc;
5415 #endif
5416 }
5417 do { /* Truncate trailing spaces */
5418 label[di] = 0;
5419 if (di == 0) break;
5420 } while (label[--di] == ' ');
5421 }
5422 }
5423 }
5424 if (res == FR_NO_FILE) { /* No label entry and return nul string */
5425 label[0] = 0;
5426 res = FR_OK;
5427 }
5428 }
5429
5430 /* Get volume serial number */
5431 if (res == FR_OK && vsn) {
5432 res = move_window(fs, fs->volbase); /* Load VBR */
5433 if (res == FR_OK) {
5434 switch (fs->fs_type) {
5435 case FS_EXFAT:
5436 di = BPB_VolIDEx;
5437 break;
5438
5439 case FS_FAT32:
5440 di = BS_VolID32;
5441 break;
5442
5443 default: /* FAT12/16 */
5444 di = fs->win[BS_BootSig] == 0x29 ? BS_VolID : 0;
5445 }
5446 *vsn = di ? ld_dword(fs->win + di) : 0; /* Get VSN in the VBR */
5447 }
5448 }
5449
5450 LEAVE_FF(fs, res);
5451 }
5452
5453
5454
5455 #if !FF_FS_READONLY
5456 /*-----------------------------------------------------------------------*/
5457 /* Set Volume Label */
5458 /*-----------------------------------------------------------------------*/
5459
5460 FRESULT f_setlabel (
5461 const TCHAR* label /* Volume label to set with heading logical drive number */
5462 )
5463 {
5464 FRESULT res;
5465 FATFS *fs;
5466 DIR dj;
5467 BYTE dirvn[22];
5468 UINT di;
5469 WCHAR wc;
5470 static const char badchr[18] = "+.,;=[]" "/*:<>|\\\"\?\x7F"; /* [0..16] for FAT, [7..16] for exFAT */
5471 #if FF_USE_LFN
5472 DWORD dc;
5473 #endif
5474
5475 /* Get logical drive */
5476 res = mount_volume(&label, &fs, FA_WRITE);
5477 if (res != FR_OK) LEAVE_FF(fs, res);
5478 #if FF_STR_VOLUME_ID == 2
5479 for ( ; *label == '/'; label++) ; /* Snip the separators off */
5480 #endif
5481
5482 #if FF_FS_EXFAT
5483 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
5484 memset(dirvn, 0, 22);
5485 di = 0;
5486 while ((UINT)*label >= ' ') { /* Create volume label */
5487 dc = tchar2uni(&label); /* Get a Unicode character */
5488 if (dc >= 0x10000) {
5489 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */
5490 dc = 0;
5491 } else {
5492 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++;
5493 }
5494 }
5495 if (dc == 0 || strchr(&badchr[7], (int)dc) || di >= 11) { /* Check validity of the volume label */
5496 LEAVE_FF(fs, FR_INVALID_NAME);
5497 }
5498 st_word(dirvn + di * 2, (WCHAR)dc); di++;
5499 }
5500 } else
5501 #endif
5502 { /* On the FAT/FAT32 volume */
5503 memset(dirvn, ' ', 11);
5504 di = 0;
5505 while ((UINT)*label >= ' ') { /* Create volume label */
5506 #if FF_USE_LFN
5507 dc = tchar2uni(&label);
5508 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0;
5509 #else /* ANSI/OEM input */
5510 wc = (BYTE)*label++;
5511 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0;
5512 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */
5513 #if FF_CODE_PAGE == 0
5514 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5515 #elif FF_CODE_PAGE < 900
5516 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5517 #endif
5518 #endif
5519 if (wc == 0 || strchr(&badchr[0], (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */
5520 LEAVE_FF(fs, FR_INVALID_NAME);
5521 }
5522 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8);
5523 dirvn[di++] = (BYTE)wc;
5524 }
5525 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
5526 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */
5527 }
5528
5529 /* Set volume label */
5530 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5531 res = dir_sdi(&dj, 0);
5532 if (res == FR_OK) {
5533 res = DIR_READ_LABEL(&dj); /* Get volume label entry */
5534 if (res == FR_OK) {
5535 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5536 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */
5537 memcpy(dj.dir + XDIR_Label, dirvn, 22);
5538 } else {
5539 if (di != 0) {
5540 memcpy(dj.dir, dirvn, 11); /* Change the volume label */
5541 } else {
5542 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */
5543 }
5544 }
5545 fs->wflag = 1;
5546 res = sync_fs(fs);
5547 } else { /* No volume label entry or an error */
5548 if (res == FR_NO_FILE) {
5549 res = FR_OK;
5550 if (di != 0) { /* Create a volume label entry */
5551 res = dir_alloc(&dj, 1); /* Allocate an entry */
5552 if (res == FR_OK) {
5553 memset(dj.dir, 0, SZDIRE); /* Clean the entry */
5554 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5555 dj.dir[XDIR_Type] = ET_VLABEL; /* Create volume label entry */
5556 dj.dir[XDIR_NumLabel] = (BYTE)di;
5557 memcpy(dj.dir + XDIR_Label, dirvn, 22);
5558 } else {
5559 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */
5560 memcpy(dj.dir, dirvn, 11);
5561 }
5562 fs->wflag = 1;
5563 res = sync_fs(fs);
5564 }
5565 }
5566 }
5567 }
5568 }
5569
5570 LEAVE_FF(fs, res);
5571 }
5572
5573 #endif /* !FF_FS_READONLY */
5574 #endif /* FF_USE_LABEL */
5575
5576
5577
5578 #if FF_USE_EXPAND && !FF_FS_READONLY
5579 /*-----------------------------------------------------------------------*/
5580 /* Allocate a Contiguous Blocks to the File */
5581 /*-----------------------------------------------------------------------*/
5582
5583 FRESULT f_expand (
5584 FIL* fp, /* Pointer to the file object */
5585 FSIZE_t fsz, /* File size to be expanded to */
5586 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */
5587 )
5588 {
5589 FRESULT res;
5590 FATFS *fs;
5591 DWORD n, clst, stcl, scl, ncl, tcl, lclst;
5592
5593
5594 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5595 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5596 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
5597 #if FF_FS_EXFAT
5598 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */
5599 #endif
5600 n = (DWORD)fs->csize * SS(fs); /* Cluster size */
5601 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */
5602 stcl = fs->last_clst; lclst = 0;
5603 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
5604
5605 #if FF_FS_EXFAT
5606 if (fs->fs_type == FS_EXFAT) {
5607 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */
5608 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */
5609 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
5610 if (res == FR_OK) { /* A contiguous free area is found */
5611 if (opt) { /* Allocate it now */
5612 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */
5613 lclst = scl + tcl - 1;
5614 } else { /* Set it as suggested point for next allocation */
5615 lclst = scl - 1;
5616 }
5617 }
5618 } else
5619 #endif
5620 {
5621 scl = clst = stcl; ncl = 0;
5622 for (;;) { /* Find a contiguous cluster block */
5623 n = get_fat(&fp->obj, clst);
5624 if (++clst >= fs->n_fatent) clst = 2;
5625 if (n == 1) {
5626 res = FR_INT_ERR; break;
5627 }
5628 if (n == 0xFFFFFFFF) {
5629 res = FR_DISK_ERR; break;
5630 }
5631 if (n == 0) { /* Is it a free cluster? */
5632 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */
5633 } else {
5634 scl = clst; ncl = 0; /* Not a free cluster */
5635 }
5636 if (clst == stcl) { /* No contiguous cluster? */
5637 res = FR_DENIED; break;
5638 }
5639 }
5640 if (res == FR_OK) { /* A contiguous free area is found */
5641 if (opt) { /* Allocate it now */
5642 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */
5643 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
5644 if (res != FR_OK) break;
5645 lclst = clst;
5646 }
5647 } else { /* Set it as suggested point for next allocation */
5648 lclst = scl - 1;
5649 }
5650 }
5651 }
5652
5653 if (res == FR_OK) {
5654 fs->last_clst = lclst; /* Set suggested start cluster to start next */
5655 if (opt) { /* Is it allocated now? */
5656 fp->obj.sclust = scl; /* Update object allocation information */
5657 fp->obj.objsize = fsz;
5658 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */
5659 fp->flag |= FA_MODIFIED;
5660 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */
5661 fs->free_clst -= tcl;
5662 fs->fsi_flag |= 1;
5663 }
5664 }
5665 }
5666
5667 LEAVE_FF(fs, res);
5668 }
5669
5670 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */
5671
5672
5673
5674 #if FF_USE_FORWARD
5675 /*-----------------------------------------------------------------------*/
5676 /* Forward Data to the Stream Directly */
5677 /*-----------------------------------------------------------------------*/
5678
5679 FRESULT f_forward (
5680 FIL* fp, /* Pointer to the file object */
5681 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
5682 UINT btf, /* Number of bytes to forward */
5683 UINT* bf /* Pointer to number of bytes forwarded */
5684 )
5685 {
5686 FRESULT res;
5687 FATFS *fs;
5688 DWORD clst;
5689 LBA_t sect;
5690 FSIZE_t remain;
5691 UINT rcnt, csect;
5692 BYTE *dbuf;
5693
5694
5695 *bf = 0; /* Clear transfer byte counter */
5696 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5697 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5698 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
5699
5700 remain = fp->obj.objsize - fp->fptr;
5701 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
5702
5703 for ( ; btf > 0 && (*func)(0, 0); fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { /* Repeat until all data transferred or stream goes busy */
5704 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
5705 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
5706 if (csect == 0) { /* On the cluster boundary? */
5707 clst = (fp->fptr == 0) ? /* On the top of the file? */
5708 fp->obj.sclust : get_fat(&fp->obj, fp->clust);
5709 if (clst <= 1) ABORT(fs, FR_INT_ERR);
5710 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
5711 fp->clust = clst; /* Update current cluster */
5712 }
5713 }
5714 sect = clst2sect(fs, fp->clust); /* Get current data sector */
5715 if (sect == 0) ABORT(fs, FR_INT_ERR);
5716 sect += csect;
5717 #if FF_FS_TINY
5718 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */
5719 dbuf = fs->win;
5720 #else
5721 if (fp->sect != sect) { /* Fill sector cache with file data */
5722 #if !FF_FS_READONLY
5723 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
5724 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5725 fp->flag &= (BYTE)~FA_DIRTY;
5726 }
5727 #endif
5728 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5729 }
5730 dbuf = fp->buf;
5731 #endif
5732 fp->sect = sect;
5733 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
5734 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */
5735 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */
5736 if (rcnt == 0) ABORT(fs, FR_INT_ERR);
5737 }
5738
5739 LEAVE_FF(fs, FR_OK);
5740 }
5741 #endif /* FF_USE_FORWARD */
5742
5743
5744
5745 #if !FF_FS_READONLY && FF_USE_MKFS
5746 /*-----------------------------------------------------------------------*/
5747 /* Create FAT/exFAT volume (with sub-functions) */
5748 /*-----------------------------------------------------------------------*/
5749
5750 #define N_SEC_TRACK 63 /* Sectors per track for determination of drive CHS */
5751 #define GPT_ALIGN 0x100000 /* Alignment of partitions in GPT [byte] (>=128KB) */
5752 #define GPT_ITEMS 128 /* Number of GPT table size (>=128, sector aligned) */
5753
5754
5755 /* Create partitions on the physical drive in format of MBR or GPT */
5756
5757 static FRESULT create_partition (
5758 BYTE drv, /* Physical drive number */
5759 const LBA_t plst[], /* Partition list */
5760 BYTE sys, /* System ID for each partition (for only MBR) */
5761 BYTE *buf /* Working buffer for a sector */
5762 )
5763 {
5764 UINT i, cy;
5765 LBA_t sz_drv;
5766 DWORD sz_drv32, nxt_alloc32, sz_part32;
5767 BYTE *pte;
5768 BYTE hd, n_hd, sc, n_sc;
5769
5770 /* Get physical drive size */
5771 if (disk_ioctl(drv, GET_SECTOR_COUNT, &sz_drv) != RES_OK) return FR_DISK_ERR;
5772
5773 #if FF_LBA64
5774 if (sz_drv >= FF_MIN_GPT) { /* Create partitions in GPT format */
5775 WORD ss;
5776 UINT sz_ptbl, pi, si, ofs;
5777 DWORD bcc, rnd, align;
5778 QWORD nxt_alloc, sz_part, sz_pool, top_bpt;
5779 static const BYTE gpt_mbr[16] = {0x00, 0x00, 0x02, 0x00, 0xEE, 0xFE, 0xFF, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF};
5780
5781 #if FF_MAX_SS != FF_MIN_SS
5782 if (disk_ioctl(drv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; /* Get sector size */
5783 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5784 #else
5785 ss = FF_MAX_SS;
5786 #endif
5787 rnd = (DWORD)sz_drv + GET_FATTIME(); /* Random seed */
5788 align = GPT_ALIGN / ss; /* Partition alignment for GPT [sector] */
5789 sz_ptbl = GPT_ITEMS * SZ_GPTE / ss; /* Size of partition table [sector] */
5790 top_bpt = sz_drv - sz_ptbl - 1; /* Backup partition table start LBA */
5791 nxt_alloc = 2 + sz_ptbl; /* First allocatable LBA */
5792 sz_pool = top_bpt - nxt_alloc; /* Size of allocatable area [sector] */
5793 bcc = 0xFFFFFFFF; sz_part = 1;
5794 pi = si = 0; /* partition table index, map index */
5795 do {
5796 if (pi * SZ_GPTE % ss == 0) memset(buf, 0, ss); /* Clean the buffer if needed */
5797 if (sz_part != 0) { /* Is the size table not termintated? */
5798 nxt_alloc = (nxt_alloc + align - 1) & ((QWORD)0 - align); /* Align partition start LBA */
5799 sz_part = plst[si++]; /* Get a partition size */
5800 if (sz_part <= 100) { /* Is the size in percentage? */
5801 sz_part = sz_pool * sz_part / 100; /* Sectors in percentage */
5802 sz_part = (sz_part + align - 1) & ((QWORD)0 - align); /* Align partition end LBA (only if in percentage) */
5803 }
5804 if (nxt_alloc + sz_part > top_bpt) { /* Clip the size at end of the pool */
5805 sz_part = (nxt_alloc < top_bpt) ? top_bpt - nxt_alloc : 0;
5806 }
5807 }
5808 if (sz_part != 0) { /* Add a partition? */
5809 ofs = pi * SZ_GPTE % ss;
5810 memcpy(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16); /* Set partition GUID (Microsoft Basic Data) */
5811 rnd = make_rand(rnd, buf + ofs + GPTE_UpGuid, 16); /* Set unique partition GUID */
5812 st_qword(buf + ofs + GPTE_FstLba, nxt_alloc); /* Set partition start LBA */
5813 st_qword(buf + ofs + GPTE_LstLba, nxt_alloc + sz_part - 1); /* Set partition end LBA */
5814 nxt_alloc += sz_part; /* Next allocatable LBA */
5815 }
5816 if ((pi + 1) * SZ_GPTE % ss == 0) { /* Write the sector buffer if it is filled up */
5817 for (i = 0; i < ss; bcc = crc32(bcc, buf[i++])) ; /* Calculate table check sum */
5818 if (disk_write(drv, buf, 2 + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Write to primary table */
5819 if (disk_write(drv, buf, top_bpt + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Write to secondary table */
5820 }
5821 } while (++pi < GPT_ITEMS);
5822
5823 /* Create primary GPT header */
5824 memset(buf, 0, ss);
5825 memcpy(buf + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16); /* Signature, version (1.0) and size (92) */
5826 st_dword(buf + GPTH_PtBcc, ~bcc); /* Table check sum */
5827 st_qword(buf + GPTH_CurLba, 1); /* LBA of this header */
5828 st_qword(buf + GPTH_BakLba, sz_drv - 1); /* LBA of secondary header */
5829 st_qword(buf + GPTH_FstLba, 2 + sz_ptbl); /* LBA of first allocatable sector */
5830 st_qword(buf + GPTH_LstLba, top_bpt - 1); /* LBA of last allocatable sector */
5831 st_dword(buf + GPTH_PteSize, SZ_GPTE); /* Size of a table entry */
5832 st_dword(buf + GPTH_PtNum, GPT_ITEMS); /* Number of table entries */
5833 st_dword(buf + GPTH_PtOfs, 2); /* LBA of this table */
5834 rnd = make_rand(rnd, buf + GPTH_DskGuid, 16); /* Disk GUID */
5835 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */
5836 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */
5837 if (disk_write(drv, buf, 1, 1) != RES_OK) return FR_DISK_ERR;
5838
5839 /* Create secondary GPT header */
5840 st_qword(buf + GPTH_CurLba, sz_drv - 1); /* LBA of this header */
5841 st_qword(buf + GPTH_BakLba, 1); /* LBA of primary header */
5842 st_qword(buf + GPTH_PtOfs, top_bpt); /* LBA of this table */
5843 st_dword(buf + GPTH_Bcc, 0);
5844 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */
5845 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */
5846 if (disk_write(drv, buf, sz_drv - 1, 1) != RES_OK) return FR_DISK_ERR;
5847
5848 /* Create protective MBR */
5849 memset(buf, 0, ss);
5850 memcpy(buf + MBR_Table, gpt_mbr, 16); /* Create a GPT partition */
5851 st_word(buf + BS_55AA, 0xAA55);
5852 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;
5853
5854 } else
5855 #endif
5856 { /* Create partitions in MBR format */
5857 sz_drv32 = (DWORD)sz_drv;
5858 n_sc = N_SEC_TRACK; /* Determine drive CHS without any consideration of the drive geometry */
5859 for (n_hd = 8; n_hd != 0 && sz_drv32 / n_hd / n_sc > 1024; n_hd *= 2) ;
5860 if (n_hd == 0) n_hd = 255; /* Number of heads needs to be <256 */
5861
5862 memset(buf, 0, FF_MAX_SS); /* Clear MBR */
5863 pte = buf + MBR_Table; /* Partition table in the MBR */
5864 for (i = 0, nxt_alloc32 = n_sc; i < 4 && nxt_alloc32 != 0 && nxt_alloc32 < sz_drv32; i++, nxt_alloc32 += sz_part32) {
5865 sz_part32 = (DWORD)plst[i]; /* Get partition size */
5866 if (sz_part32 <= 100) sz_part32 = (sz_part32 == 100) ? sz_drv32 : sz_drv32 / 100 * sz_part32; /* Size in percentage? */
5867 if (nxt_alloc32 + sz_part32 > sz_drv32 || nxt_alloc32 + sz_part32 < nxt_alloc32) sz_part32 = sz_drv32 - nxt_alloc32; /* Clip at drive size */
5868 if (sz_part32 == 0) break; /* End of table or no sector to allocate? */
5869
5870 st_dword(pte + PTE_StLba, nxt_alloc32); /* Partition start LBA sector */
5871 st_dword(pte + PTE_SizLba, sz_part32); /* Size of partition [sector] */
5872 pte[PTE_System] = sys; /* System type */
5873
5874 cy = (UINT)(nxt_alloc32 / n_sc / n_hd); /* Partitio start CHS cylinder */
5875 hd = (BYTE)(nxt_alloc32 / n_sc % n_hd); /* Partition start CHS head */
5876 sc = (BYTE)(nxt_alloc32 % n_sc + 1); /* Partition start CHS sector */
5877 pte[PTE_StHead] = hd;
5878 pte[PTE_StSec] = (BYTE)((cy >> 2 & 0xC0) | sc);
5879 pte[PTE_StCyl] = (BYTE)cy;
5880
5881 cy = (UINT)((nxt_alloc32 + sz_part32 - 1) / n_sc / n_hd); /* Partition end CHS cylinder */
5882 hd = (BYTE)((nxt_alloc32 + sz_part32 - 1) / n_sc % n_hd); /* Partition end CHS head */
5883 sc = (BYTE)((nxt_alloc32 + sz_part32 - 1) % n_sc + 1); /* Partition end CHS sector */
5884 pte[PTE_EdHead] = hd;
5885 pte[PTE_EdSec] = (BYTE)((cy >> 2 & 0xC0) | sc);
5886 pte[PTE_EdCyl] = (BYTE)cy;
5887
5888 pte += SZ_PTE; /* Next entry */
5889 }
5890
5891 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */
5892 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */
5893 }
5894
5895 return FR_OK;
5896 }
5897
5898
5899
5900 FRESULT f_mkfs (
5901 const TCHAR* path, /* Logical drive number */
5902 const MKFS_PARM* opt, /* Format options */
5903 void* work, /* Pointer to working buffer (null: use len bytes of heap memory) */
5904 UINT len /* Size of working buffer [byte] */
5905 )
5906 {
5907 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4K sector unit) */
5908 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128K sector unit) */
5909 static const MKFS_PARM defopt = {FM_ANY, 0, 0, 0, 0}; /* Default parameter */
5910 BYTE fsopt, fsty, sys, pdrv, ipart;
5911 BYTE *buf;
5912 BYTE *pte;
5913 WORD ss; /* Sector size */
5914 DWORD sz_buf, sz_blk, n_clst, pau, nsect, n, vsn;
5915 LBA_t sz_vol, b_vol, b_fat, b_data; /* Volume size, base LBA of volume, base LBA of FAT and base LBA of data */
5916 LBA_t sect, lba[2];
5917 DWORD sz_rsv, sz_fat, sz_dir, sz_au; /* Size of reserved area, FAT area, directry area, data area and cluster */
5918 UINT n_fat, n_root, i; /* Number of FATs, number of roor directory entries and some index */
5919 int vol;
5920 DSTATUS ds;
5921 FRESULT res;
5922
5923
5924 /* Check mounted drive and clear work area */
5925 vol = get_ldnumber(&path); /* Get target logical drive */
5926 if (vol < 0) return FR_INVALID_DRIVE;
5927 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the fs object if mounted */
5928 pdrv = LD2PD(vol); /* Hosting physical drive */
5929 ipart = LD2PT(vol); /* Hosting partition (0:create as new, 1..:existing partition) */
5930
5931 /* Initialize the hosting physical drive */
5932 ds = disk_initialize(pdrv);
5933 if (ds & STA_NOINIT) return FR_NOT_READY;
5934 if (ds & STA_PROTECT) return FR_WRITE_PROTECTED;
5935
5936 /* Get physical drive parameters (sz_drv, sz_blk and ss) */
5937 if (!opt) opt = &defopt; /* Use default parameter if it is not given */
5938 sz_blk = opt->align;
5939 if (sz_blk == 0) disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk); /* Block size from the parameter or lower layer */
5940 if (sz_blk == 0 || sz_blk > 0x8000 || (sz_blk & (sz_blk - 1))) sz_blk = 1; /* Use default if the block size is invalid */
5941 #if FF_MAX_SS != FF_MIN_SS
5942 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
5943 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5944 #else
5945 ss = FF_MAX_SS;
5946 #endif
5947
5948 /* Options for FAT sub-type and FAT parameters */
5949 fsopt = opt->fmt & (FM_ANY | FM_SFD);
5950 n_fat = (opt->n_fat >= 1 && opt->n_fat <= 2) ? opt->n_fat : 1;
5951 n_root = (opt->n_root >= 1 && opt->n_root <= 32768 && (opt->n_root % (ss / SZDIRE)) == 0) ? opt->n_root : 512;
5952 sz_au = (opt->au_size <= 0x1000000 && (opt->au_size & (opt->au_size - 1)) == 0) ? opt->au_size : 0;
5953 sz_au /= ss; /* Byte --> Sector */
5954
5955 /* Get working buffer */
5956 sz_buf = len / ss; /* Size of working buffer [sector] */
5957 if (sz_buf == 0) return FR_NOT_ENOUGH_CORE;
5958 buf = (BYTE*)work; /* Working buffer */
5959 #if FF_USE_LFN == 3
5960 if (!buf) buf = ff_memalloc(sz_buf * ss); /* Use heap memory for working buffer */
5961 #endif
5962 if (!buf) return FR_NOT_ENOUGH_CORE;
5963
5964 /* Determine where the volume to be located (b_vol, sz_vol) */
5965 b_vol = sz_vol = 0;
5966 if (FF_MULTI_PARTITION && ipart != 0) { /* Is the volume associated with any specific partition? */
5967 /* Get partition location from the existing partition table */
5968 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */
5969 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */
5970 #if FF_LBA64
5971 if (buf[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */
5972 DWORD n_ent, ofs;
5973 QWORD pt_lba;
5974
5975 /* Get the partition location from GPT */
5976 if (disk_read(pdrv, buf, 1, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load GPT header sector (next to MBR) */
5977 if (!test_gpt_header(buf)) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if GPT header is valid */
5978 n_ent = ld_dword(buf + GPTH_PtNum); /* Number of entries */
5979 pt_lba = ld_qword(buf + GPTH_PtOfs); /* Table start sector */
5980 ofs = i = 0;
5981 while (n_ent) { /* Find MS Basic partition with order of ipart */
5982 if (ofs == 0 && disk_read(pdrv, buf, pt_lba++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Get PT sector */
5983 if (!memcmp(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16) && ++i == ipart) { /* MS basic data partition? */
5984 b_vol = ld_qword(buf + ofs + GPTE_FstLba);
5985 sz_vol = ld_qword(buf + ofs + GPTE_LstLba) - b_vol + 1;
5986 break;
5987 }
5988 n_ent--; ofs = (ofs + SZ_GPTE) % ss; /* Next entry */
5989 }
5990 if (n_ent == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* Partition not found */
5991 fsopt |= 0x80; /* Partitioning is in GPT */
5992 } else
5993 #endif
5994 { /* Get the partition location from MBR partition table */
5995 pte = buf + (MBR_Table + (ipart - 1) * SZ_PTE);
5996 if (ipart > 4 || pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */
5997 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */
5998 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */
5999 }
6000 } else { /* The volume is associated with a physical drive */
6001 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6002 if (!(fsopt & FM_SFD)) { /* To be partitioned? */
6003 /* Create a single-partition on the drive in this function */
6004 #if FF_LBA64
6005 if (sz_vol >= FF_MIN_GPT) { /* Which partition type to create, MBR or GPT? */
6006 fsopt |= 0x80; /* Partitioning is in GPT */
6007 b_vol = GPT_ALIGN / ss; sz_vol -= b_vol + GPT_ITEMS * SZ_GPTE / ss + 1; /* Estimated partition offset and size */
6008 } else
6009 #endif
6010 { /* Partitioning is in MBR */
6011 if (sz_vol > N_SEC_TRACK) {
6012 b_vol = N_SEC_TRACK; sz_vol -= b_vol; /* Estimated partition offset and size */
6013 }
6014 }
6015 }
6016 }
6017 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128 sectors */
6018
6019 /* Now start to create an FAT volume at b_vol and sz_vol */
6020
6021 do { /* Pre-determine the FAT type */
6022 if (FF_FS_EXFAT && (fsopt & FM_EXFAT)) { /* exFAT possible? */
6023 if ((fsopt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || sz_au > 128) { /* exFAT only, vol >= 64M sectors or sz_au > 128 sectors ? */
6024 fsty = FS_EXFAT; break;
6025 }
6026 }
6027 #if FF_LBA64
6028 if (sz_vol >= 0x100000000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too large volume for FAT/FAT32 */
6029 #endif
6030 if (sz_au > 128) sz_au = 128; /* Invalid AU for FAT/FAT32? */
6031 if (fsopt & FM_FAT32) { /* FAT32 possible? */
6032 if (!(fsopt & FM_FAT)) { /* no-FAT? */
6033 fsty = FS_FAT32; break;
6034 }
6035 }
6036 if (!(fsopt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */
6037 fsty = FS_FAT16;
6038 } while (0);
6039
6040 vsn = (DWORD)sz_vol + GET_FATTIME(); /* VSN generated from current time and partition size */
6041
6042 #if FF_FS_EXFAT
6043 if (fsty == FS_EXFAT) { /* Create an exFAT volume */
6044 DWORD szb_bit, szb_case, sum, nbit, clu, clen[3];
6045 WCHAR ch, si;
6046 UINT j, st;
6047
6048 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume for exFAT? */
6049 #if FF_USE_TRIM
6050 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */
6051 disk_ioctl(pdrv, CTRL_TRIM, lba);
6052 #endif
6053 /* Determine FAT location, data location and number of clusters */
6054 if (sz_au == 0) { /* AU auto-selection */
6055 sz_au = 8;
6056 if (sz_vol >= 0x80000) sz_au = 64; /* >= 512Ks */
6057 if (sz_vol >= 0x4000000) sz_au = 256; /* >= 64Ms */
6058 }
6059 b_fat = b_vol + 32; /* FAT start at offset 32 */
6060 sz_fat = (DWORD)((sz_vol / sz_au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */
6061 b_data = (b_fat + sz_fat + sz_blk - 1) & ~((LBA_t)sz_blk - 1); /* Align data area to the erase block boundary */
6062 if (b_data - b_vol >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
6063 n_clst = (DWORD)((sz_vol - (b_data - b_vol)) / sz_au); /* Number of clusters */
6064 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */
6065 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */
6066
6067 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */
6068 clen[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss); /* Number of allocation bitmap clusters */
6069
6070 /* Create a compressed up-case table */
6071 sect = b_data + sz_au * clen[0]; /* Table start sector */
6072 sum = 0; /* Table checksum to be stored in the 82 entry */
6073 st = 0; si = 0; i = 0; j = 0; szb_case = 0;
6074 do {
6075 switch (st) {
6076 case 0:
6077 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */
6078 if (ch != si) {
6079 si++; break; /* Store the up-case char if exist */
6080 }
6081 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */
6082 if (j >= 128) {
6083 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 chars */
6084 }
6085 st = 1; /* Do not compress short run */
6086 /* FALLTHROUGH */
6087 case 1:
6088 ch = si++; /* Fill the short run */
6089 if (--j == 0) st = 0;
6090 break;
6091
6092 default:
6093 ch = (WCHAR)j; si += (WCHAR)j; /* Number of chars to skip */
6094 st = 0;
6095 }
6096 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */
6097 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
6098 i += 2; szb_case += 2;
6099 if (si == 0 || i == sz_buf * ss) { /* Write buffered data when buffer full or end of process */
6100 n = (i + ss - 1) / ss;
6101 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6102 sect += n; i = 0;
6103 }
6104 } while (si);
6105 clen[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss); /* Number of up-case table clusters */
6106 clen[2] = 1; /* Number of root directory clusters */
6107
6108 /* Initialize the allocation bitmap */
6109 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of bitmap sectors */
6110 nbit = clen[0] + clen[1] + clen[2]; /* Number of clusters in-use by system (bitmap, up-case and root-dir) */
6111 do {
6112 memset(buf, 0, sz_buf * ss); /* Initialize bitmap buffer */
6113 for (i = 0; nbit != 0 && i / 8 < sz_buf * ss; buf[i / 8] |= 1 << (i % 8), i++, nbit--) ; /* Mark used clusters */
6114 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
6115 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6116 sect += n; nsect -= n;
6117 } while (nsect);
6118
6119 /* Initialize the FAT */
6120 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */
6121 j = nbit = clu = 0;
6122 do {
6123 memset(buf, 0, sz_buf * ss); i = 0; /* Clear work area and reset write offset */
6124 if (clu == 0) { /* Initialize FAT [0] and FAT[1] */
6125 st_dword(buf + i, 0xFFFFFFF8); i += 4; clu++;
6126 st_dword(buf + i, 0xFFFFFFFF); i += 4; clu++;
6127 }
6128
6129 do { /* Create chains of bitmap, up-case and root directory */
6130 while (nbit != 0 && i < sz_buf * ss) { /* Create a chain */
6131 st_dword(buf + i, (nbit > 1) ? clu + 1 : 0xFFFFFFFF);
6132 i += 4; clu++; nbit--;
6133 }
6134 if (nbit == 0 && j < 3) nbit = clen[j++]; /* Get next chain length */
6135 } while (nbit != 0 && i < sz_buf * ss);
6136 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
6137 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6138 sect += n; nsect -= n;
6139 } while (nsect);
6140
6141 /* Initialize the root directory */
6142 memset(buf, 0, sz_buf * ss);
6143 buf[SZDIRE * 0 + 0] = ET_VLABEL; /* Volume label entry (no label) */
6144 buf[SZDIRE * 1 + 0] = ET_BITMAP; /* Bitmap entry */
6145 st_dword(buf + SZDIRE * 1 + 20, 2); /* cluster */
6146 st_dword(buf + SZDIRE * 1 + 24, szb_bit); /* size */
6147 buf[SZDIRE * 2 + 0] = ET_UPCASE; /* Up-case table entry */
6148 st_dword(buf + SZDIRE * 2 + 4, sum); /* sum */
6149 st_dword(buf + SZDIRE * 2 + 20, 2 + clen[0]); /* cluster */
6150 st_dword(buf + SZDIRE * 2 + 24, szb_case); /* size */
6151 sect = b_data + sz_au * (clen[0] + clen[1]); nsect = sz_au; /* Start of the root directory and number of sectors */
6152 do { /* Fill root directory sectors */
6153 n = (nsect > sz_buf) ? sz_buf : nsect;
6154 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6155 memset(buf, 0, ss); /* Rest of entries are filled with zero */
6156 sect += n; nsect -= n;
6157 } while (nsect);
6158
6159 /* Create two set of the exFAT VBR blocks */
6160 sect = b_vol;
6161 for (n = 0; n < 2; n++) {
6162 /* Main record (+0) */
6163 memset(buf, 0, ss);
6164 memcpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */
6165 st_qword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */
6166 st_qword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */
6167 st_dword(buf + BPB_FatOfsEx, (DWORD)(b_fat - b_vol)); /* FAT offset [sector] */
6168 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */
6169 st_dword(buf + BPB_DataOfsEx, (DWORD)(b_data - b_vol)); /* Data offset [sector] */
6170 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */
6171 st_dword(buf + BPB_RootClusEx, 2 + clen[0] + clen[1]); /* Root directory cluster number */
6172 st_dword(buf + BPB_VolIDEx, vsn); /* VSN */
6173 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */
6174 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */
6175 for (buf[BPB_SecPerClusEx] = 0, i = sz_au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */
6176 buf[BPB_NumFATsEx] = 1; /* Number of FATs */
6177 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */
6178 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */
6179 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */
6180 for (i = sum = 0; i < ss; i++) { /* VBR checksum */
6181 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
6182 }
6183 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6184 /* Extended bootstrap record (+1..+8) */
6185 memset(buf, 0, ss);
6186 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */
6187 for (j = 1; j < 9; j++) {
6188 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
6189 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6190 }
6191 /* OEM/Reserved record (+9..+10) */
6192 memset(buf, 0, ss);
6193 for ( ; j < 11; j++) {
6194 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
6195 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6196 }
6197 /* Sum record (+11) */
6198 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */
6199 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6200 }
6201
6202 } else
6203 #endif /* FF_FS_EXFAT */
6204 { /* Create an FAT/FAT32 volume */
6205 do {
6206 pau = sz_au;
6207 /* Pre-determine number of clusters and FAT sub-type */
6208 if (fsty == FS_FAT32) { /* FAT32 volume */
6209 if (pau == 0) { /* AU auto-selection */
6210 n = (DWORD)sz_vol / 0x20000; /* Volume size in unit of 128KS */
6211 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */
6212 }
6213 n_clst = (DWORD)sz_vol / pau; /* Number of clusters */
6214 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */
6215 sz_rsv = 32; /* Number of reserved sectors */
6216 sz_dir = 0; /* No static directory */
6217 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED);
6218 } else { /* FAT volume */
6219 if (pau == 0) { /* au auto-selection */
6220 n = (DWORD)sz_vol / 0x1000; /* Volume size in unit of 4KS */
6221 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */
6222 }
6223 n_clst = (DWORD)sz_vol / pau;
6224 if (n_clst > MAX_FAT12) {
6225 n = n_clst * 2 + 4; /* FAT size [byte] */
6226 } else {
6227 fsty = FS_FAT12;
6228 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */
6229 }
6230 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */
6231 sz_rsv = 1; /* Number of reserved sectors */
6232 sz_dir = (DWORD)n_root * SZDIRE / ss; /* Root directory size [sector] */
6233 }
6234 b_fat = b_vol + sz_rsv; /* FAT base */
6235 b_data = b_fat + sz_fat * n_fat + sz_dir; /* Data base */
6236
6237 /* Align data area to erase block boundary (for flash memory media) */
6238 n = (DWORD)(((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data); /* Sectors to next nearest from current data base */
6239 if (fsty == FS_FAT32) { /* FAT32: Move FAT */
6240 sz_rsv += n; b_fat += n;
6241 } else { /* FAT: Expand FAT */
6242 if (n % n_fat) { /* Adjust fractional error if needed */
6243 n--; sz_rsv++; b_fat++;
6244 }
6245 sz_fat += n / n_fat;
6246 }
6247
6248 /* Determine number of clusters and final check of validity of the FAT sub-type */
6249 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
6250 n_clst = ((DWORD)sz_vol - sz_rsv - sz_fat * n_fat - sz_dir) / pau;
6251 if (fsty == FS_FAT32) {
6252 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32? */
6253 if (sz_au == 0 && (sz_au = pau / 2) != 0) continue; /* Adjust cluster size and retry */
6254 LEAVE_MKFS(FR_MKFS_ABORTED);
6255 }
6256 }
6257 if (fsty == FS_FAT16) {
6258 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */
6259 if (sz_au == 0 && (pau * 2) <= 64) {
6260 sz_au = pau * 2; continue; /* Adjust cluster size and retry */
6261 }
6262 if ((fsopt & FM_FAT32)) {
6263 fsty = FS_FAT32; continue; /* Switch type to FAT32 and retry */
6264 }
6265 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
6266 LEAVE_MKFS(FR_MKFS_ABORTED);
6267 }
6268 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */
6269 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
6270 LEAVE_MKFS(FR_MKFS_ABORTED);
6271 }
6272 }
6273 if (fsty == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */
6274
6275 /* Ok, it is the valid cluster configuration */
6276 break;
6277 } while (1);
6278
6279 #if FF_USE_TRIM
6280 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */
6281 disk_ioctl(pdrv, CTRL_TRIM, lba);
6282 #endif
6283 /* Create FAT VBR */
6284 memset(buf, 0, ss);
6285 memcpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11); /* Boot jump code (x86), OEM name */
6286 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */
6287 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */
6288 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */
6289 buf[BPB_NumFATs] = (BYTE)n_fat; /* Number of FATs */
6290 st_word(buf + BPB_RootEntCnt, (WORD)((fsty == FS_FAT32) ? 0 : n_root)); /* Number of root directory entries */
6291 if (sz_vol < 0x10000) {
6292 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */
6293 } else {
6294 st_dword(buf + BPB_TotSec32, (DWORD)sz_vol); /* Volume size in 32-bit LBA */
6295 }
6296 buf[BPB_Media] = 0xF8; /* Media descriptor byte */
6297 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */
6298 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */
6299 st_dword(buf + BPB_HiddSec, (DWORD)b_vol); /* Volume offset in the physical drive [sector] */
6300 if (fsty == FS_FAT32) {
6301 st_dword(buf + BS_VolID32, vsn); /* VSN */
6302 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */
6303 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */
6304 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */
6305 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */
6306 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */
6307 buf[BS_BootSig32] = 0x29; /* Extended boot signature */
6308 memcpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
6309 } else {
6310 st_dword(buf + BS_VolID, vsn); /* VSN */
6311 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */
6312 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */
6313 buf[BS_BootSig] = 0x29; /* Extended boot signature */
6314 memcpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
6315 }
6316 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */
6317 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */
6318
6319 /* Create FSINFO record if needed */
6320 if (fsty == FS_FAT32) {
6321 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */
6322 memset(buf, 0, ss);
6323 st_dword(buf + FSI_LeadSig, 0x41615252);
6324 st_dword(buf + FSI_StrucSig, 0x61417272);
6325 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
6326 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */
6327 st_word(buf + BS_55AA, 0xAA55);
6328 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */
6329 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */
6330 }
6331
6332 /* Initialize FAT area */
6333 memset(buf, 0, sz_buf * ss);
6334 sect = b_fat; /* FAT start sector */
6335 for (i = 0; i < n_fat; i++) { /* Initialize FATs each */
6336 if (fsty == FS_FAT32) {
6337 st_dword(buf + 0, 0xFFFFFFF8); /* FAT[0] */
6338 st_dword(buf + 4, 0xFFFFFFFF); /* FAT[1] */
6339 st_dword(buf + 8, 0x0FFFFFFF); /* FAT[2] (root directory at cluster# 2) */
6340 } else {
6341 st_dword(buf + 0, (fsty == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* FAT[0] and FAT[1] */
6342 }
6343 nsect = sz_fat; /* Number of FAT sectors */
6344 do { /* Fill FAT sectors */
6345 n = (nsect > sz_buf) ? sz_buf : nsect;
6346 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6347 memset(buf, 0, ss); /* Rest of FAT area is initially zero */
6348 sect += n; nsect -= n;
6349 } while (nsect);
6350 }
6351
6352 /* Initialize root directory (fill with zero) */
6353 nsect = (fsty == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */
6354 do {
6355 n = (nsect > sz_buf) ? sz_buf : nsect;
6356 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6357 sect += n; nsect -= n;
6358 } while (nsect);
6359 }
6360
6361 /* A FAT volume has been created here */
6362
6363 /* Determine system ID in the MBR partition table */
6364 if (FF_FS_EXFAT && fsty == FS_EXFAT) {
6365 sys = 0x07; /* exFAT */
6366 } else if (fsty == FS_FAT32) {
6367 sys = 0x0C; /* FAT32X */
6368 } else if (sz_vol >= 0x10000) {
6369 sys = 0x06; /* FAT12/16 (large) */
6370 } else if (fsty == FS_FAT16) {
6371 sys = 0x04; /* FAT16 */
6372 } else {
6373 sys = 0x01; /* FAT12 */
6374 }
6375
6376 /* Update partition information */
6377 if (FF_MULTI_PARTITION && ipart != 0) { /* Volume is in the existing partition */
6378 if (!FF_LBA64 || !(fsopt & 0x80)) { /* Is the partition in MBR? */
6379 /* Update system ID in the partition table */
6380 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */
6381 buf[MBR_Table + (ipart - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */
6382 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */
6383 }
6384 } else { /* Volume as a new single partition */
6385 if (!(fsopt & FM_SFD)) { /* Create partition table if not in SFD format */
6386 lba[0] = sz_vol; lba[1] = 0;
6387 res = create_partition(pdrv, lba, sys, buf);
6388 if (res != FR_OK) LEAVE_MKFS(res);
6389 }
6390 }
6391
6392 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6393
6394 LEAVE_MKFS(FR_OK);
6395 }
6396
6397
6398
6399
6400 #if FF_MULTI_PARTITION
6401 /*-----------------------------------------------------------------------*/
6402 /* Create Partition Table on the Physical Drive */
6403 /*-----------------------------------------------------------------------*/
6404
6405 FRESULT f_fdisk (
6406 BYTE pdrv, /* Physical drive number */
6407 const LBA_t ptbl[], /* Pointer to the size table for each partitions */
6408 void* work /* Pointer to the working buffer (null: use heap memory) */
6409 )
6410 {
6411 BYTE *buf = (BYTE*)work;
6412 DSTATUS stat;
6413 FRESULT res;
6414
6415
6416 /* Initialize the physical drive */
6417 stat = disk_initialize(pdrv);
6418 if (stat & STA_NOINIT) return FR_NOT_READY;
6419 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
6420
6421 #if FF_USE_LFN == 3
6422 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */
6423 #endif
6424 if (!buf) return FR_NOT_ENOUGH_CORE;
6425
6426 res = create_partition(pdrv, ptbl, 0x07, buf); /* Create partitions (system ID is temporary setting and determined by f_mkfs) */
6427
6428 LEAVE_MKFS(res);
6429 }
6430
6431 #endif /* FF_MULTI_PARTITION */
6432 #endif /* !FF_FS_READONLY && FF_USE_MKFS */
6433
6434
6435
6436
6437 #if FF_USE_STRFUNC
6438 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3)
6439 #error Wrong FF_STRF_ENCODE setting
6440 #endif
6441 /*-----------------------------------------------------------------------*/
6442 /* Get a String from the File */
6443 /*-----------------------------------------------------------------------*/
6444
6445 TCHAR* f_gets (
6446 TCHAR* buff, /* Pointer to the buffer to store read string */
6447 int len, /* Size of string buffer (items) */
6448 FIL* fp /* Pointer to the file object */
6449 )
6450 {
6451 int nc = 0;
6452 TCHAR *p = buff;
6453 BYTE s[4];
6454 UINT rc;
6455 DWORD dc;
6456 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE <= 2
6457 WCHAR wc;
6458 #endif
6459 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE == 3
6460 UINT ct;
6461 #endif
6462
6463 #if FF_USE_LFN && FF_LFN_UNICODE /* With code conversion (Unicode API) */
6464 /* Make a room for the character and terminator */
6465 if (FF_LFN_UNICODE == 1) len -= (FF_STRF_ENCODE == 0) ? 1 : 2;
6466 if (FF_LFN_UNICODE == 2) len -= (FF_STRF_ENCODE == 0) ? 3 : 4;
6467 if (FF_LFN_UNICODE == 3) len -= 1;
6468 while (nc < len) {
6469 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */
6470 f_read(fp, s, 1, &rc); /* Get a code unit */
6471 if (rc != 1) break; /* EOF? */
6472 wc = s[0];
6473 if (dbc_1st((BYTE)wc)) { /* DBC 1st byte? */
6474 f_read(fp, s, 1, &rc); /* Get 2nd byte */
6475 if (rc != 1 || !dbc_2nd(s[0])) continue; /* Wrong code? */
6476 wc = wc << 8 | s[0];
6477 }
6478 dc = ff_oem2uni(wc, CODEPAGE); /* Convert ANSI/OEM into Unicode */
6479 if (dc == 0) continue; /* Conversion error? */
6480 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */
6481 f_read(fp, s, 2, &rc); /* Get a code unit */
6482 if (rc != 2) break; /* EOF? */
6483 dc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6484 if (IsSurrogateL(dc)) continue; /* Broken surrogate pair? */
6485 if (IsSurrogateH(dc)) { /* High surrogate? */
6486 f_read(fp, s, 2, &rc); /* Get low surrogate */
6487 if (rc != 2) break; /* EOF? */
6488 wc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6489 if (!IsSurrogateL(wc)) continue; /* Broken surrogate pair? */
6490 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF); /* Merge surrogate pair */
6491 }
6492 #else /* Read a character in UTF-8 */
6493 f_read(fp, s, 1, &rc); /* Get a code unit */
6494 if (rc != 1) break; /* EOF? */
6495 dc = s[0];
6496 if (dc >= 0x80) { /* Multi-byte sequence? */
6497 ct = 0;
6498 if ((dc & 0xE0) == 0xC0) { /* 2-byte sequence? */
6499 dc &= 0x1F; ct = 1;
6500 }
6501 if ((dc & 0xF0) == 0xE0) { /* 3-byte sequence? */
6502 dc &= 0x0F; ct = 2;
6503 }
6504 if ((dc & 0xF8) == 0xF0) { /* 4-byte sequence? */
6505 dc &= 0x07; ct = 3;
6506 }
6507 if (ct == 0) continue;
6508 f_read(fp, s, ct, &rc); /* Get trailing bytes */
6509 if (rc != ct) break;
6510 rc = 0;
6511 do { /* Merge the byte sequence */
6512 if ((s[rc] & 0xC0) != 0x80) break;
6513 dc = dc << 6 | (s[rc] & 0x3F);
6514 } while (++rc < ct);
6515 if (rc != ct || dc < 0x80 || IsSurrogate(dc) || dc >= 0x110000) continue; /* Wrong encoding? */
6516 }
6517 #endif
6518 /* A code point is available in dc to be output */
6519
6520 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; /* Strip \r off if needed */
6521 #if FF_LFN_UNICODE == 1 || FF_LFN_UNICODE == 3 /* Output it in UTF-16/32 encoding */
6522 if (FF_LFN_UNICODE == 1 && dc >= 0x10000) { /* Out of BMP at UTF-16? */
6523 *p++ = (TCHAR)(0xD800 | ((dc >> 10) - 0x40)); nc++; /* Make and output high surrogate */
6524 dc = 0xDC00 | (dc & 0x3FF); /* Make low surrogate */
6525 }
6526 *p++ = (TCHAR)dc; nc++;
6527 if (dc == '\n') break; /* End of line? */
6528 #elif FF_LFN_UNICODE == 2 /* Output it in UTF-8 encoding */
6529 if (dc < 0x80) { /* Single byte? */
6530 *p++ = (TCHAR)dc;
6531 nc++;
6532 if (dc == '\n') break; /* End of line? */
6533 } else if (dc < 0x800) { /* 2-byte sequence? */
6534 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F));
6535 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6536 nc += 2;
6537 } else if (dc < 0x10000) { /* 3-byte sequence? */
6538 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F));
6539 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6540 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6541 nc += 3;
6542 } else { /* 4-byte sequence */
6543 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07));
6544 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F));
6545 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6546 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6547 nc += 4;
6548 }
6549 #endif
6550 }
6551
6552 #else /* Byte-by-byte read without any conversion (ANSI/OEM API) */
6553 len -= 1; /* Make a room for the terminator */
6554 while (nc < len) {
6555 f_read(fp, s, 1, &rc); /* Get a byte */
6556 if (rc != 1) break; /* EOF? */
6557 dc = s[0];
6558 if (FF_USE_STRFUNC == 2 && dc == '\r') continue;
6559 *p++ = (TCHAR)dc; nc++;
6560 if (dc == '\n') break;
6561 }
6562 #endif
6563
6564 *p = 0; /* Terminate the string */
6565 return nc ? buff : 0; /* When no data read due to EOF or error, return with error. */
6566 }
6567
6568
6569
6570
6571 #if !FF_FS_READONLY
6572 #include <stdarg.h>
6573 #define SZ_PUTC_BUF 64
6574 #define SZ_NUM_BUF 32
6575
6576 /*-----------------------------------------------------------------------*/
6577 /* Put a Character to the File (with sub-functions) */
6578 /*-----------------------------------------------------------------------*/
6579
6580 /* Output buffer and work area */
6581
6582 typedef struct {
6583 FIL *fp; /* Pointer to the writing file */
6584 int idx, nchr; /* Write index of buf[] (-1:error), number of written encoding units */
6585 #if FF_USE_LFN && FF_LFN_UNICODE == 1
6586 WCHAR hs;
6587 #elif FF_USE_LFN && FF_LFN_UNICODE == 2
6588 BYTE bs[4];
6589 UINT wi, ct;
6590 #endif
6591 BYTE buf[SZ_PUTC_BUF]; /* Write buffer */
6592 } putbuff;
6593
6594
6595 /* Buffered file write with code conversion */
6596
6597 static void putc_bfd (putbuff* pb, TCHAR c)
6598 {
6599 UINT n;
6600 int i, nc;
6601 #if FF_USE_LFN && FF_LFN_UNICODE
6602 WCHAR hs, wc;
6603 #if FF_LFN_UNICODE == 2
6604 DWORD dc;
6605 const TCHAR* tp;
6606 #endif
6607 #endif
6608
6609 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
6610 putc_bfd(pb, '\r');
6611 }
6612
6613 i = pb->idx; /* Write index of pb->buf[] */
6614 if (i < 0) return; /* In write error? */
6615 nc = pb->nchr; /* Write unit counter */
6616
6617 #if FF_USE_LFN && FF_LFN_UNICODE
6618 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
6619 if (IsSurrogateH(c)) { /* Is this a high-surrogate? */
6620 pb->hs = c; return; /* Save it for next */
6621 }
6622 hs = pb->hs; pb->hs = 0;
6623 if (hs != 0) { /* Is there a leading high-surrogate? */
6624 if (!IsSurrogateL(c)) hs = 0; /* Discard high-surrogate if a stray high-surrogate */
6625 } else {
6626 if (IsSurrogateL(c)) return; /* Discard stray low-surrogate */
6627 }
6628 wc = c;
6629 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
6630 for (;;) {
6631 if (pb->ct == 0) { /* Not in the multi-byte sequence? */
6632 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */
6633 if ((BYTE)c < 0x80) break; /* Single byte code? */
6634 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte sequence? */
6635 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte sequence? */
6636 if (((BYTE)c & 0xF8) == 0xF0) pb->ct = 3; /* 4-byte sequence? */
6637 return; /* Invalid leading byte (discard it) */
6638 } else { /* In the multi-byte sequence */
6639 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */
6640 pb->ct = 0; continue; /* Discard the sequence */
6641 }
6642 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */
6643 if (--pb->ct == 0) break; /* End of the sequence? */
6644 return;
6645 }
6646 }
6647 tp = (const TCHAR*)pb->bs;
6648 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */
6649 if (dc == 0xFFFFFFFF) return; /* Wrong code? */
6650 hs = (WCHAR)(dc >> 16);
6651 wc = (WCHAR)dc;
6652 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
6653 if (IsSurrogate(c) || c >= 0x110000) return; /* Discard invalid code */
6654 if (c >= 0x10000) { /* Out of BMP? */
6655 hs = (WCHAR)(0xD800 | ((c >> 10) - 0x40)); /* Make high surrogate */
6656 wc = 0xDC00 | (c & 0x3FF); /* Make low surrogate */
6657 } else {
6658 hs = 0;
6659 wc = (WCHAR)c;
6660 }
6661 #endif
6662 /* A code point in UTF-16 is available in hs and wc */
6663
6664 #if FF_STRF_ENCODE == 1 /* Write a code point in UTF-16LE */
6665 if (hs != 0) { /* Surrogate pair? */
6666 st_word(&pb->buf[i], hs);
6667 i += 2;
6668 nc++;
6669 }
6670 st_word(&pb->buf[i], wc);
6671 i += 2;
6672 #elif FF_STRF_ENCODE == 2 /* Write a code point in UTF-16BE */
6673 if (hs != 0) { /* Surrogate pair? */
6674 pb->buf[i++] = (BYTE)(hs >> 8);
6675 pb->buf[i++] = (BYTE)hs;
6676 nc++;
6677 }
6678 pb->buf[i++] = (BYTE)(wc >> 8);
6679 pb->buf[i++] = (BYTE)wc;
6680 #elif FF_STRF_ENCODE == 3 /* Write a code point in UTF-8 */
6681 if (hs != 0) { /* 4-byte sequence? */
6682 nc += 3;
6683 hs = (hs & 0x3FF) + 0x40;
6684 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8);
6685 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F));
6686 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F));
6687 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6688 } else {
6689 if (wc < 0x80) { /* Single byte? */
6690 pb->buf[i++] = (BYTE)wc;
6691 } else {
6692 if (wc < 0x800) { /* 2-byte sequence? */
6693 nc += 1;
6694 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6);
6695 } else { /* 3-byte sequence */
6696 nc += 2;
6697 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12);
6698 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F));
6699 }
6700 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6701 }
6702 }
6703 #else /* Write a code point in ANSI/OEM */
6704 if (hs != 0) return;
6705 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */
6706 if (wc == 0) return;
6707 if (wc >= 0x100) {
6708 pb->buf[i++] = (BYTE)(wc >> 8); nc++;
6709 }
6710 pb->buf[i++] = (BYTE)wc;
6711 #endif
6712
6713 #else /* ANSI/OEM input (without re-encoding) */
6714 pb->buf[i++] = (BYTE)c;
6715 #endif
6716
6717 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */
6718 f_write(pb->fp, pb->buf, (UINT)i, &n);
6719 i = (n == (UINT)i) ? 0 : -1;
6720 }
6721 pb->idx = i;
6722 pb->nchr = nc + 1;
6723 }
6724
6725
6726 /* Flush characters left in the buffer and return number of characters written */
6727
6728 static int putc_flush (putbuff* pb)
6729 {
6730 UINT nw;
6731
6732 if ( pb->idx >= 0 /* Flush buffered characters to the file */
6733 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
6734 && (UINT)pb->idx == nw) {
6735 return pb->nchr;
6736 }
6737 return -1;
6738 }
6739
6740
6741 /* Initialize write buffer */
6742
6743 static void putc_init (putbuff* pb, FIL* fp)
6744 {
6745 memset(pb, 0, sizeof (putbuff));
6746 pb->fp = fp;
6747 }
6748
6749
6750
6751 int f_putc (
6752 TCHAR c, /* A character to be output */
6753 FIL* fp /* Pointer to the file object */
6754 )
6755 {
6756 putbuff pb;
6757
6758
6759 putc_init(&pb, fp);
6760 putc_bfd(&pb, c); /* Put the character */
6761 return putc_flush(&pb);
6762 }
6763
6764
6765
6766
6767 /*-----------------------------------------------------------------------*/
6768 /* Put a String to the File */
6769 /*-----------------------------------------------------------------------*/
6770
6771 int f_puts (
6772 const TCHAR* str, /* Pointer to the string to be output */
6773 FIL* fp /* Pointer to the file object */
6774 )
6775 {
6776 putbuff pb;
6777
6778
6779 putc_init(&pb, fp);
6780 while (*str) putc_bfd(&pb, *str++); /* Put the string */
6781 return putc_flush(&pb);
6782 }
6783
6784
6785
6786
6787 /*-----------------------------------------------------------------------*/
6788 /* Put a Formatted String to the File (with sub-functions) */
6789 /*-----------------------------------------------------------------------*/
6790 #if FF_PRINT_FLOAT && FF_INTDEF == 2
6791 #include <math.h>
6792
6793 static int ilog10 (double n) /* Calculate log10(n) in integer output */
6794 {
6795 int rv = 0;
6796
6797 while (n >= 10) { /* Decimate digit in right shift */
6798 if (n >= 100000) {
6799 n /= 100000; rv += 5;
6800 } else {
6801 n /= 10; rv++;
6802 }
6803 }
6804 while (n < 1) { /* Decimate digit in left shift */
6805 if (n < 0.00001) {
6806 n *= 100000; rv -= 5;
6807 } else {
6808 n *= 10; rv--;
6809 }
6810 }
6811 return rv;
6812 }
6813
6814
6815 static double i10x (int n) /* Calculate 10^n in integer input */
6816 {
6817 double rv = 1;
6818
6819 while (n > 0) { /* Left shift */
6820 if (n >= 5) {
6821 rv *= 100000; n -= 5;
6822 } else {
6823 rv *= 10; n--;
6824 }
6825 }
6826 while (n < 0) { /* Right shift */
6827 if (n <= -5) {
6828 rv /= 100000; n += 5;
6829 } else {
6830 rv /= 10; n++;
6831 }
6832 }
6833 return rv;
6834 }
6835
6836
6837 static void ftoa (
6838 char* buf, /* Buffer to output the floating point string */
6839 double val, /* Value to output */
6840 int prec, /* Number of fractional digits */
6841 TCHAR fmt /* Notation */
6842 )
6843 {
6844 int digit;
6845 int exp = 0, mag = 0;
6846 char sign = 0;
6847 double w;
6848 const char *er = 0;
6849 const char ds = FF_PRINT_FLOAT == 2 ? ',' : '.';
6850
6851
6852 if (isnan(val)) { /* Not a number? */
6853 er = "NaN";
6854 } else {
6855 if (prec < 0) prec = 6; /* Default precision? (6 fractional digits) */
6856 if (val < 0) { /* Negative? */
6857 val = 0 - val; sign = '-';
6858 } else {
6859 sign = '+';
6860 }
6861 if (isinf(val)) { /* Infinite? */
6862 er = "INF";
6863 } else {
6864 if (fmt == 'f') { /* Decimal notation? */
6865 val += i10x(0 - prec) / 2; /* Round (nearest) */
6866 mag = ilog10(val);
6867 if (mag < 0) mag = 0;
6868 if (mag + prec + 3 >= SZ_NUM_BUF) er = "OV"; /* Buffer overflow? */
6869 } else { /* E notation */
6870 if (val != 0) { /* Not a true zero? */
6871 val += i10x(ilog10(val) - prec) / 2; /* Round (nearest) */
6872 exp = ilog10(val);
6873 if (exp > 99 || prec + 7 >= SZ_NUM_BUF) { /* Buffer overflow or E > +99? */
6874 er = "OV";
6875 } else {
6876 if (exp < -99) exp = -99;
6877 val /= i10x(exp); /* Normalize */
6878 }
6879 }
6880 }
6881 }
6882 if (!er) { /* Not error condition */
6883 if (sign == '-') *buf++ = sign; /* Add a - if negative value */
6884 do { /* Put decimal number */
6885 if (mag == -1) *buf++ = ds; /* Insert a decimal separator when get into fractional part */
6886 w = i10x(mag); /* Snip the highest digit d */
6887 digit = (int)(val / w); val -= digit * w;
6888 *buf++ = (char)('0' + digit); /* Put the digit */
6889 } while (--mag >= -prec); /* Output all digits specified by prec */
6890 if (fmt != 'f') { /* Put exponent if needed */
6891 *buf++ = (char)fmt;
6892 if (exp < 0) {
6893 exp = 0 - exp; *buf++ = '-';
6894 } else {
6895 *buf++ = '+';
6896 }
6897 *buf++ = (char)('0' + exp / 10);
6898 *buf++ = (char)('0' + exp % 10);
6899 }
6900 }
6901 }
6902 if (er) { /* Error condition */
6903 if (sign) *buf++ = sign; /* Add sign if needed */
6904 do { /* Put error symbol */
6905 *buf++ = *er++;
6906 } while (*er);
6907 }
6908 *buf = 0; /* Term */
6909 }
6910 #endif /* FF_PRINT_FLOAT && FF_INTDEF == 2 */
6911
6912
6913
6914 int f_printf (
6915 FIL* fp, /* Pointer to the file object */
6916 const TCHAR* fmt, /* Pointer to the format string */
6917 ... /* Optional arguments... */
6918 )
6919 {
6920 va_list arp;
6921 putbuff pb;
6922 UINT i, j, width, flag, radix;
6923 int prec;
6924 #if FF_PRINT_LLI && FF_INTDEF == 2
6925 QWORD val;
6926 #else
6927 DWORD val;
6928 #endif
6929 TCHAR *tp;
6930 TCHAR chr, pad;
6931 TCHAR nul = 0;
6932 char digit, str[SZ_NUM_BUF];
6933
6934
6935 putc_init(&pb, fp);
6936
6937 va_start(arp, fmt);
6938
6939 for (;;) {
6940 chr = *fmt++;
6941 if (chr == 0) break; /* End of format string */
6942 if (chr != '%') { /* Not an escape character (pass-through) */
6943 putc_bfd(&pb, chr);
6944 continue;
6945 }
6946 flag = width = 0; pad = ' '; prec = -1; /* Initialize the parameters */
6947 chr = *fmt++;
6948 if (chr == '0') { /* Flag: '0' padded */
6949 pad = '0'; chr = *fmt++;
6950 } else if (chr == '-') { /* Flag: Left aligned */
6951 flag = 2; chr = *fmt++;
6952 }
6953 if (chr == '*') { /* Minimum width from an argument */
6954 width = (UINT)va_arg(arp, int);
6955 chr = *fmt++;
6956 } else {
6957 while (IsDigit(chr)) { /* Minimum width */
6958 width = width * 10 + chr - '0';
6959 chr = *fmt++;
6960 }
6961 }
6962 if (chr == '.') { /* Precision */
6963 chr = *fmt++;
6964 if (chr == '*') { /* Precision from an argument */
6965 prec = va_arg(arp, int);
6966 chr = *fmt++;
6967 } else {
6968 prec = 0;
6969 while (IsDigit(chr)) { /* Precision */
6970 prec = prec * 10 + chr - '0';
6971 chr = *fmt++;
6972 }
6973 }
6974 }
6975 if (chr == 'l') { /* Size: long int */
6976 flag |= 4; chr = *fmt++;
6977 #if FF_PRINT_LLI && FF_INTDEF == 2
6978 if (chr == 'l') { /* Size: long long int */
6979 flag |= 8; chr = *fmt++;
6980 }
6981 #endif
6982 }
6983 if (chr == 0) break; /* End of format string */
6984 switch (chr) { /* Atgument type is... */
6985 case 'b': /* Unsigned binary */
6986 radix = 2; break;
6987
6988 case 'o': /* Unsigned octal */
6989 radix = 8; break;
6990
6991 case 'd': /* Signed decimal */
6992 case 'u': /* Unsigned decimal */
6993 radix = 10; break;
6994
6995 case 'x': /* Unsigned hexadecimal (lower case) */
6996 case 'X': /* Unsigned hexadecimal (upper case) */
6997 radix = 16; break;
6998
6999 case 'c': /* Character */
7000 putc_bfd(&pb, (TCHAR)va_arg(arp, int));
7001 continue;
7002
7003 case 's': /* String */
7004 tp = va_arg(arp, TCHAR*); /* Get a pointer argument */
7005 if (!tp) tp = &nul; /* Null pointer generates a null string */
7006 for (j = 0; tp[j]; j++) ; /* j = tcslen(tp) */
7007 if (prec >= 0 && j > (UINT)prec) j = (UINT)prec; /* Limited length of string body */
7008 for ( ; !(flag & 2) && j < width; j++) putc_bfd(&pb, pad); /* Left padding */
7009 while (*tp && prec--) putc_bfd(&pb, *tp++); /* Body */
7010 while (j++ < width) putc_bfd(&pb, ' '); /* Right padding */
7011 continue;
7012 #if FF_PRINT_FLOAT && FF_INTDEF == 2
7013 case 'f': /* Floating point (decimal) */
7014 case 'e': /* Floating point (e) */
7015 case 'E': /* Floating point (E) */
7016 ftoa(str, va_arg(arp, double), prec, chr); /* Make a floating point string */
7017 for (j = strlen(str); !(flag & 2) && j < width; j++) putc_bfd(&pb, pad); /* Leading pads */
7018 for (i = 0; str[i]; putc_bfd(&pb, str[i++])) ; /* Body */
7019 while (j++ < width) putc_bfd(&pb, ' '); /* Trailing pads */
7020 continue;
7021 #endif
7022 default: /* Unknown type (pass-through) */
7023 putc_bfd(&pb, chr);
7024 continue;
7025 }
7026
7027 /* Get an integer argument and put it in numeral */
7028 #if FF_PRINT_LLI && FF_INTDEF == 2
7029 if (flag & 8) { /* long long argument? */
7030 val = (QWORD)va_arg(arp, long long);
7031 } else if (flag & 4) { /* long argument? */
7032 val = (chr == 'd') ? (QWORD)(long long)va_arg(arp, long) : (QWORD)va_arg(arp, unsigned long);
7033 } else { /* int/short/char argument */
7034 val = (chr == 'd') ? (QWORD)(long long)va_arg(arp, int) : (QWORD)va_arg(arp, unsigned int);
7035 }
7036 if (chr == 'd' && (val & 0x8000000000000000)) { /* Negative value? */
7037 val = 0 - val; flag |= 1;
7038 }
7039 #else
7040 if (flag & 4) { /* long argument? */
7041 val = (DWORD)va_arg(arp, long);
7042 } else { /* int/short/char argument */
7043 val = (chr == 'd') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int);
7044 }
7045 if (chr == 'd' && (val & 0x80000000)) { /* Negative value? */
7046 val = 0 - val; flag |= 1;
7047 }
7048 #endif
7049 i = 0;
7050 do { /* Make an integer number string */
7051 digit = (char)(val % radix) + '0'; val /= radix;
7052 if (digit > '9') digit += (chr == 'x') ? 0x27 : 0x07;
7053 str[i++] = digit;
7054 } while (val && i < SZ_NUM_BUF);
7055 if (flag & 1) str[i++] = '-'; /* Sign */
7056 /* Write it */
7057 for (j = i; !(flag & 2) && j < width; j++) { /* Leading pads */
7058 putc_bfd(&pb, pad);
7059 }
7060 do { /* Body */
7061 putc_bfd(&pb, (TCHAR)str[--i]);
7062 } while (i);
7063 while (j++ < width) { /* Trailing pads */
7064 putc_bfd(&pb, ' ');
7065 }
7066 }
7067
7068 va_end(arp);
7069
7070 return putc_flush(&pb);
7071 }
7072
7073 #endif /* !FF_FS_READONLY */
7074 #endif /* FF_USE_STRFUNC */
7075
7076
7077
7078 #if FF_CODE_PAGE == 0
7079 /*-----------------------------------------------------------------------*/
7080 /* Set Active Codepage for the Path Name */
7081 /*-----------------------------------------------------------------------*/
7082
7083 FRESULT f_setcp (
7084 WORD cp /* Value to be set as active code page */
7085 )
7086 {
7087 static const WORD validcp[22] = { 437, 720, 737, 771, 775, 850, 852, 855, 857, 860, 861, 862, 863, 864, 865, 866, 869, 932, 936, 949, 950, 0};
7088 static const BYTE *const tables[22] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct855, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0};
7089 UINT i;
7090
7091
7092 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */
7093 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */
7094
7095 CodePage = cp;
7096 if (cp >= 900) { /* DBCS */
7097 ExCvt = 0;
7098 DbcTbl = tables[i];
7099 } else { /* SBCS */
7100 ExCvt = tables[i];
7101 DbcTbl = 0;
7102 }
7103 return FR_OK;
7104 }
7105 #endif /* FF_CODE_PAGE == 0 */
7106
7107
